What is the y-intercept of y=-3-7r?

-3

because

y = mx+b

b = y-intercept

y-intercept: - 3

Step-by-step explanation:

y-intercept is for r = 0.

We have the equation y = - 3 - 7r.

Substitute r = 0:

y = - 3 - 7 (0) = - 3 - 0 = - 3

Other way.

The slope-intercept form of an equation of a line:

y = mx + b (y = mr + b).

m - slope

b - y-intercept

We have the equation y = - 3 - 7r = - 7r - 3. Therefore m = - 7 and b = - 3.