Question

What equation matches the graph?

A. y = -3x + 1
B. y = -3x - 1
C. y = -2x + 1
D. y = -2x - 1

Answer 1

A y = -3x + 1

Explanation:

y = mx + b When need to know the m (slope) and the b (y-intercept

The b is where the line crosses the y axis. It crosses the y axis at 1. The slope tells us the steepness of the line.

If you start at the point (0,1) and move three units down and I unit to the right, you will be back on the line. The slope is -3/1 which simplifies to -3