Posted by **Penny** on Friday, July 13, 2012 at 1:12pm.

A boat is worth $7,000 when it is 5 years old and $2,000 when it is 10 years old. What is the slope intercept equation?

- algebra -
**Steve**, Friday, July 13, 2012 at 2:27pm
You have two points: (5,7000) and (10,2000)

the two-point equation for the line is thus

(y-7000)/(x-5) = (2000-7000)/(10-5)

or, after rearranging things a bit:

y = -1000x + 12000

That is, the value started at $12,000, and depreciates $1000/year

## Answer This Question

## Related Questions

- math - The value of a car decreases at a constant rate as it grows older. When ...
- math - The value of a car decreases at a constant rate as it grows older. When ...
- finance - You want to save $1,000,000 for your retirement (under 40 years old) ...
- Economics - Given the following data, use present worth analysis to ﬁnd ...
- algebra - child is now 3 years old - dad opens account with $10,000 it earns 4.5...
- Math - 2x represents that Clyde is twice (2 times) as old as Bonnie. 6 years ...
- algebra - A person is 3 times as old as aonther person but in 15 years she will ...
- Math - The depreciation rate, r, for a $50,000 news car is given by the function...
- Math - The equation V = -2000t + 20,000 describes the value in dollars of a ...
- EASY Math - The equation V = -2000t + 20,000 describes the value in dollars of a...

More Related Questions