Answer:c
Step-by-step explanation:
Answer: 45,000.
Step-by-step explanation:
The equation of inverse variation is given by:-

, where k is the constant of proportionality.
Given: After owning the car for 3 years, its value is $15,000. After owning the car for 5 years, its value is $9,000.
Here,

Then, 
or
[answer is same in both cases.]
Hence, the constant of proportionality in this inverse variation is 45,000.
7x - 4y + 8=0 slope intercept is y=mx+b so you have to get y alone
+4y =+4y so add for y on both sides
7x + 8=4y Then divided 4y on both sides
7x/4 8/4= 4y/4
slope intercept form is y=7/4x+2