Answer:
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.
