A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined below.

Question

yhat = 183.8 − 20.48x

(a) Find the resale value in dollars of such a car when it is 3 years old.
$

(b) Find the resale value in dollars of such a car when it is 6 years old.
$

(c) What is the average annual decrease in the resale price in dollars of these cars?
$

Answer 1

a)183.8 - 20.48 (3) = 122.36 = $12,236

b)183.8 - 20.48 (6) =

c)answer is right in front of you $2048

Answer 2

Thank you, I just did another one of these and missed it can you look at it and help me figure out what I did wrong?
A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars), per unit of equipment manufactured and the number of units produced per run, x. The resulting equation for the line of best fit is given below, with x being observed for values between 10 and 200. If a production run was scheduled to produce 55 units, what would you predict the cost per unit to be in dollars?
yhat = 7.88 − 0.05x
$ 5.13 is the answer I got I put 7.88-0.05(55) and came up with 5.13 but that is wrong.

Answer 3

"y (in tens of thousands of dollars)"

Answer 4

I am lost, can you give me the equations and I will work it out. Sorry not my best subject

Answer 5

so multiply by 10,000
5.13 * 10 = 51.3
5.13 * 100 = 513
5.13 * 1000 = 5130
5.13 * 10,000 = 51,300

Answer 6

According to the question, 5.13 is in tens of thousand of dollars, so the correct answer should be
$51300,
and the $ sign is already given before the answer box, right?