Question

How do you write an equation of a line with m=-3, b=0?

Answer 1

Use the slope-intercept form: `y=mx+b`, where `m` is the slope, and `b` is the y-intercept.

The equation for a line with a slope, `m` of `-3`, and a y-intercept, `b`, of 0.

`y=-3x`

The absence of a value for `b` is understood to be a y-intercept, `b`, of 0.