SOLUTION: wHAT IS THE LINEAR EQUATION ANSWER FOR 7x+2y=o, and I have to graph it by corridinate like x y 0,0 1,1 2,2 and it have to make a straghit line thanks u

Algebra ->  Linear-equations -> SOLUTION: wHAT IS THE LINEAR EQUATION ANSWER FOR 7x+2y=o, and I have to graph it by corridinate like x y 0,0 1,1 2,2 and it have to make a straghit line thanks u      Log On


   

Question 150346: wHAT IS THE LINEAR EQUATION ANSWER FOR 7x+2y=o, and I have to graph it by corridinate like
x y
0,0
1,1
2,2 and it have to make a straghit line thanks u
Answer by mangopeeler07(462) About Me  (Show Source):
You can put this solution on YOUR website!
7x+2y=0
isolate y
2y=-7x
y=-7/2x

This is the equation for the line.
To get coordinates, plug in a value for either y or x and solve for the other variable.

Plug in 2 for x
y=-7/2(2)
y=-7
(2,-7)

Plug in 4 for x
y=-7/2(4)
y=-14
(4,-14)

Plug in 1 for x
y=-7/2(1)
y=-7/2
(1, -7/2)

Continue this pattern to discover some more points to plot on the line. This graph verifies the points we have already come up with.
Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc
Equation 7+x+%2B+2+y+=+0 describes a sloping line. For any
equation ax+by+c = 0, slope is -a%2Fb+=+-7%2F2.
  • X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x = c/a. 0/7 = 0.
  • Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is 0/2 = 0.
  • Slope is -7/2 = -3.5.
  • Equation in slope-intercept form: y=-3.5*x+0.
graph%28+500%2C+500%2C+0-8%2C+0%2B8%2C+0-8%2C+0%2B8%2C+-3.5%2Ax%2B0+%29+


Also, if you are asked if a certain point (set of coordinates) is a solution to the problem, you can either plug in into the equation for the line, or reference the graph of the line to see if that point is included.