Plszszsss help

-3/2 or -2.5

Step-by-step explanation:

Use the y=mx+b formula

Subsitute given values...

y=-1/7x+b

use the point (-21,1/2) to substitute values for x and y

1/2=-1/7(-21)+b

solve

1/2=3+b

subtract both sides by 3

-3/2 = b

Therefore the answer is -3/2

answer: this is not a question

step-by-step explanation: this is a answer

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).