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Question 58769: I just don't get this at all, and I need to pass this class, HELP!!!!!
I need to find the missing coordinates for this one
y= -x+4
I have to graph each equation and plot atleast 5 points for each one:
x+4y=5
Demand Equation- Helen's Health Foods usually sells 400 cans of ProPac Muscle Punch per week. After experiencing with prices for some time, Helen has determined that the weekly demand can be found by using the equation: d=600-40p, where d is the number of cans and p is the price per can.
a) Will Helen sell more or less Muscle Punch if she raises her prices from $5?
b) What happens to her sales every time she raises her price by $1?
The line through ( -2,5) with slope of -1
Find the slope and y-intercept for each line that has a slope and y-intercept.
x+2y=3
Write each equation in standard form using only integers
y= 4/5x+2/3
Draw the graph of each line using its y-intercept and its slope
2x=y=0
Find the equation of the line that goes through the given point and has the given slope. Write the answer in slope intercept form
(-1,-5), -8
Find the equation of each line in the form y=mx=b if possible
The line through the origin that is perpendicular to the line through (-3,0) and (0, -3)
Graph each inequality-
2x-y=3> 0
2x=5y>10
I just don't understand any of this and I can't find anyone to actually sit here and help me. Please help!!!!
Answer by tutorcecilia(2152)   (Show Source):
You can put this solution on YOUR website! y= -x+4
The best way to write a table of values. There are not really any "missing coordinates". This equation requires that you plug-in certain values for x and solve for y; or plug-in certain values for y and solve for x.
Table of Values:
When x=3, y=-(3)+4 or y=1
When x=-3, y=-(-3)+4 or y=7
When x=0, y= -(0)+4 or y=4
When x=-1, y= -(-1)+4 or y=5
So, the value of y will depend on the x that is plugged into the equation.
Graph of y=-x+4
.
I have to graph each equation and plot at least 5 points for each one:
x+4y=5 [Re-write it in the slope-intercept form (y=mx+b) by solving for the y-value]
X+4y=5
x-x+4y=-x+5
4y=-x+5
4y/4=-x/4+5/4
y= (-1/4)x+5/4 [Graph this line]
Plot these points:(-3,2) (-1, 1.5)(0, 1.25)(3, .5)(5,0)(9, -1)
.
The equation for the cans and price of cans
d=600-40p
.
a) Will Helen sell more or less Muscle Punch if she raises her prices from $5?
Let p=$5
d=600-40(5)
d=400 cans will be sold at $5.00
.
Let p =$6
d=600-40(6)
d=360 cans will be sold at $6.00
So, increasing the price will cause less people to buy less cans.
b) What happens to her sales every time she raises her price by $1?
When the price is raised by $1.00 (from $5 to $6), the number of cans sold decreases by 40 cans.
.
The line through ( -2,5) with slope of -1
Use the y=mx+b form of a line:
5=(-1)(-2)+b [Plug-in the values and solve for b]
5=2+b
5-2=b
3=b [Plug the slope and the y-intercept (b) back into the equation.
Y=-1x+3
Find the slope and y-intercept for each line that has a slope and y-intercept.
x+2y=3 [Re-write in the slope-intercept form (solve for y)
x-x+2y=-x+3
2y=-x+3
Y=(-1/2)x+3/2
The slope = (-1/2)
The y-intercept = (0, 3/2)
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