Answer:
y = mx + b
y = -2x + 7
mx = Slope
-2x = Slope
Down 2, left 1 = Slope
b = y intercept
7 = y intercept
(0,7) = y intercept
part a answer is b and part b answer is 3
Step-by-step explanation:
x= -1 or x= -4
Answer:3:8 or 3/8