Question

Casey wanted to find the intercepts of the graph of the equation 10x+4y=20. He decided to put the equation in slope-intercept form first. Here is his work:

10x+4y=20
4y=20−10x
y=20−10x4
y=5−10x

He concluded that the slope is m=12 and the y-intercept is (0, 5).

What error did Casey make? Within your explanation, give the correct solved for y equation, the correct slope, and the correct y-intercept.

Answer 1

made a mistake in step 3

Explanation:

there, he should have gotten y=5-2x which is then translated to y=-2x+5

this means the y-intercept is correct, but the slope is actually -2