# Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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 Algebra: Graphs, graphing equations and inequalities Solvers Lessons Answers archive Quiz In Depth

 Question 46555: i dont know how to do substitution method x=2y-3 4x+3y=32 Click here to see answer by tutorcecilia(2152)

 Question 46585: beginning algebra book I need help in graphing this equation f(x)=-2x-5 Click here to see answer by Nate(3500)

 Question 46591: Let f(x) =2x^2 + x-1 . Sketch the graph of on the set of axes and find each of the following. Vertex: x-intercept(s): y-intercept(s): Axis of symmetry: Click here to see answer by Nate(3500)

 Question 46592: sketch any graph which is symmetric with respect to the x axis Click here to see answer by Nate(3500)

 Question 46590: please help. Let .f(x)= x+2 if -3<=x<0 x^2 + 1 if 0 <=x<=2 a. Evaluate each of the following f(-1) = ______ f(0) = ______ f(2) = ______ b. What is the domain of f(x)? c. Sketch the graph of y = f(x) on the set of axes Click here to see answer by Nate(3500)

 Question 46594: beginning algebra book I am struggling with this equation f(x)=4x-3 find the following Click here to see answer by special629(2)

 Question 46650: Find the coordinates of the midpoint of the segment whose endpoints are (-2,14) and (3,-9). Click here to see answer by checkley71(8403)

 Question 46645: Write an equation in slope-intercept form of the line satisfying the given conditions. Slope= -6 and y-intercept= -9. Click here to see answer by checkley71(8403)

 Question 46775: Please help me with this problem, I cant figure it out. x -2 -1 0 1 2 y -.111 .333 1 3 9 Given the table above, graph the function, identify the graph of the function (line, parabola, hyperbola, or exponential), explain your choice, and give the domain and range as shown in the graph, and also the domain and range of the entire function. Graph: Graph Type: Explanation: Domain: Click here to see answer by Nate(3500)

 Question 46803: pleae help me solve and graph 6x+8 _>8x-10...note the line should be under the greater than sign...:O) Click here to see answer by tutorcecilia(2152)

 Question 46857: identify the exponential function of the form f(x)=a(2^x)+b graph points provided are (2,1) and (0,-2) and the lines runs horizontal to y=-3 a. f(x)=3(2^x) b. f(x)=2^x-3 c. f(x)=2(2^x)-4 d. f(x)=2^x-2 the only one that makes sense to me is D so that when x=0, y=-2 which is point given on the line. Click here to see answer by Nate(3500)

 Question 46846: Find f^1 f(x)= 3-(x-5)^2, x is less then or = to 5 Thank you, Michelle Click here to see answer by adamchapman(301)

 Question 46950: y =x2-5x+4 is the question. I am having trouble with table of value. x= 0,1,2,3,4 and I get y= 4,0,-2,-2 0. I keep coming up with these numbers, for which then I graph. Is this right. Cheryl Click here to see answer by stanbon(57984)

 Question 46953: Hi! i have a question that asks to use a graphing calculator for the following equation. "Find the roots of the equation" y=.1x^3+2x^2-x-3 i dont know how to find the roots on the graphing calculator can someone tell me how please?? any advice will be helpful thanks! Click here to see answer by stanbon(57984)

 Question 46960: i am having problems finding the point of intersection for graphs using a graphing calculator. can someone show me how to find the point of intersection for the graphs: y=x^3+x-3 and y=2x+4 once again it says to solve using a graphing calculator. please help thanks! Click here to see answer by Nate(3500)

 Question 46966: Graph the function x2 - 6x + 8. Explain why it is not necessary to plot points to graph when using y = a (x - h) 2 + k. Explain graphing Thanks Click here to see answer by Nate(3500)

 Question 46990: How do you graph this?!? y=1n x y=e^x y=|x| can someone also tell me how to graph these on a graphing calculator? thanks. Click here to see answer by Nate(3500)

 Question 47189: Is there a formula to discovering if a given table of values is linear or quadric? example: Parent input parent output x f(x) -3 9 -1 1 Also is there a formula to find the transformation that applies between the parent & the transformed? Click here to see answer by atif.muhammad(135)

 Question 47562: If a line passes through points (-4,-3) and (0,-3) the equation for that line is: I think the answer is y= -3. Is this correct? Thank you! Click here to see answer by stanbon(57984)

 Question 47564: Given that a line y=x passes through the origin and end up to the right, what would the line y=mx look like if m=1/2? The 3 choices for answers are: A. passes through the origin and up to right (answer I chose) B. passes through the origin and up to the left C. passes through (0,1/2) and up to the right Thank you! Click here to see answer by stanbon(57984)

 Question 47561: Looking at the Line L, the slope is ______ and the value of y when x=4 is____ The points on my sample graph for Line L are (-1,0) (0,2). Knowing this, I found the slope to be 2 but I don't get how to find the value of y when they give you what x is. Click here to see answer by venugopalramana(3286)

 Question 47548: I am trying to graph 8x + 7y < -56 (that should be a greater than or equal to sign) I came up with y= -8/7x - 8 Which means the rise is -8 and the then run is +7 and my y intercept is -8 Is this correct? I am graphing system of inequalities and my first equation was x^2 + y^2 < 64 (that also is a greater than or equal to sign) That equation gave me a solid line with a radius of 8. Do these two equations intersect at the y axis of -8? Click here to see answer by stanbon(57984)

 Question 47619: Could someone PLEASE show me how to answer this problem: Determine whether the solution set to the system of inequalities is the empty set or not. y < 7x - 3 y > 7x - 1 (except that both signs should actually be greater than or equal and less than or equal) I just spemt an hour with someone who couldn't answer the question. Anyone want to help me out? Click here to see answer by checkley71(8403)

 Question 47630: Graph the functions y = x and y =2 squared x on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs. What are the points of intersection? I also need to find an on-line graphing tool to graph the plots Click here to see answer by Nate(3500)

 Question 47648: Give the equation of the function whose graph is describe. The graph of y=x^2 is shifted 4 units to the right. this graph is then vertically stretched by a factor of 5 and reflected across the x-axis.Finally the graph is shifted 8 units upward. Click here to see answer by josmiceli(9819)

 Question 47647: Give the equation of the function whose graph is describe. the graph of y=x^2 is shifted 4 units to the left. This graph is then vertically stretched by a factor of 5 and reflected across the x-axis. finally the graph is shifted 7 units downward. Help please Click here to see answer by Nate(3500)

 Question 47641: I have a problem that states, "use the graph to find solutions to the equation" and the graph shows an up-side-down U shape. Then the equation is -x²+2=-2 I don't know where to begin? How do I go about solving this? What topic is this that I could research and learn so that I can do other problems like this? THANK YOU!!! Click here to see answer by checkley71(8403)

 Question 47730: Find the exponential function f(x) = a^x and it gives a graph that is descending with points passing through (-3,8) and (1,1). I have f(-3) = a^-3 = 8, a = 1/2 so f(x) = 1/2 ^-x. This doesn't seem correct, can you help? Thank you so much!! Click here to see answer by venugopalramana(3286)

 Question 47733: Graph the function, not by plotting points, but by starting from the graphs in Figure 4. State the domain, range, and asymptote. f(x) = 1 - 2^-x I used the graph of y=2^x, reflected about the y-axis, then shift upward 1 unit. As usual, it doesn't look right, even if I turn it upside down. Thank you Thank you Thank you! Click here to see answer by stanbon(57984)

 Question 47735: Graph the function, not by plotting points, but by starting from the graph of y = e^x. State the domain, range, and asymptote. y = e^(x+3) + 4 Shift down 4 units? Thanks for helping me. I feel so stupid when it comes to math, but you all are showing me the right steps to learn it! Click here to see answer by josmiceli(9819)

 Question 47805: can some one tell me if this is correct? the question asks to describe the symmetry of the function: y = x^3 + 1 is the symmetry with respect to the y axis??....if not can you tell me how to describe it please? thanks! Click here to see answer by Nate(3500)

 Question 47734: Graph the function, not by plotting points, but by starting from the graph of y = e^x. State the domain, range, and asymptote. y = 1- e^x I tried graphing these on the computer but it won't take these exponents so I'm at a loss although I know that there is some shifting involved with the first constant. Thank you so very much for this help! Click here to see answer by longjonsilver(2297)

 Question 47836: Find the x intercept -x^2 + 6x - 2 Thanks! Click here to see answer by venugopalramana(3286)

 Question 47835: Find the x intercept y = x^2 - 5x + 3 Thank You Click here to see answer by venugopalramana(3286)

 Question 47860: graph x^2+y^2+8x-24y+16=0 If you could please show me how to work the problem so I can find the coordinates and the radius it would be greatly appreciated. Thank you Click here to see answer by stanbon(57984)

 Question 47857: Hi can someone help show me how this equation will look when graphed? "sketch the following graph" Click here to see answer by Nate(3500)

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