How do you graph 3x-4y=-12 using the intercepts?

1 Answer
May 3, 2016

If you know the x- and y-intercepts of a line you can draw the line passing through them.

Explanation:

All along the x-axis, y = 0. All along the y-axis, x = 0.

To find the x intercept, make y = 0 and solve for x.
To find the y intercept, make x = 0 and solve for y.

In this example:

For the x intercept, 3x - 4(0) = -12 rArr x = -4

For the y intercept, 3(0) - 4y =-12 rArr y = 3 graph graph{y = 3x/4 +3 [-10, 10, -5, 5]}

Draw the line through these points.