Question

What is the y-intercept ofa line that has a slope of -3 and passes through (0,-7)​

Answer 1

Slope-intercept form: y = mx + b [m is the slope, b is the y-intercept or the y value when x = 0 ---> (0 , y)]

Since you know m = -3, you can plug that into the equation

y = mx + b

y = -3x + b To find b, plug in the point they gave you into x and y, but since x = 0, your y-intercept is -7

Answer 2

y = - 7

Explanation:

The y- intercept is the point on the y- axis that the line passes through.

The line passes through the y- axis at (0, - 7), hence

the y- intercept is - 7