Answer:
D. y - 9 = 1.5(x-7)
Step-by-step explanation:
First find the slope using this formula. y2-y1/x2-x1
Plug in with (-5, -9) & (7, 9)
9-(-9)/7-(-5) = 18/12 (simplify)
18/12 ÷ 3 = 6/4 ÷ 2 = 3/2
The slope is 3/2 or 1.5
To find the y-intercept plug in one of the points (7, 9)
9 = 3/2(7) + b (b represents the y-intercept)
9 = 10.5 + b
-1.5 = b
The equation is y = 1.5x - 1.5
A. y = 1.5x + 1.5
B. y = 1.5x - 19.5
I'll just skip C the answer is D I'll show the work
y - 9 = 1.5(x-7) (distribute 1.5 to x and -7)
y - 9 = 1.5x - 10.5 (add 9 on both sides)
y = 1.5x - 1.5
