Question

The equation y-1=-7(x-3) is written in point-slope form. What is the y-intercept of the line?

a. -4
b. -2
c. 20
d. 22

Answer 1

it's maybe 22 ,(-_-メ)

Answer 2

For this case we have that, the equation of the line in slope intercept form is given by:

`y = mx + b`

Where:

m is the slope

b is the cut point with the y axis

If we have:

`y-1 = -7 (x-3)`

We take it in the form
`y = mx + b` we have:

Knowing that
`- * - = +` and applying distributive property to the terms of the parenthesis:

`y = -7x + 21 + 1\\y = -7x + 22\\So,\ b = 22`

Answer:

Option D