Answer:
D.
Step-by-step Explanation:
In the attached file
80 because if you multiply all them you would get 64,000 then divide it
Slope intercept form is y = mx + b.....so lets solve for y
9x - 7y = -7 .....subtract 9x from both sides
-7y = -9x - 7...now we divide both sides by -7
y = 9/7x + 1 <==
D=-1
-15d=15 so -d=1 so d=-1