Question

What function is graphed below?

y = 2x
y = x + 3
y = 2x + 3
y = 2x + 2

Answer 1

y = 2x + 3.

Explanation:

The y-intercept is at (0, 3) so we have y = mx + 3.

The slope = rise / run = 2/1 = 2 so m = 2.

Answer 2

y=2x+3

Explanation:

The coefficient has to be 2, since the graph has a slope of 2, and the constant has to be 3 because the y- intercept is 3.

y=2x+3