Practice!

Sample Problem

4x + 5y = 20

What is the x-intercept? ( ,0)

What is the y-intercept? (0, )

Solution

The x-intercept is found by making y = 0.

4x + 5(0) = 20

4x = 20

x = 5

The x-intercept is found by making x = 0.

4(0) + 5y = 20

5y = 20

y = 4