Question

The average value of a certain type of automobile was $13,140 in 1992 and depreciated to $9420 in 1997. Let y be the average value of the automobile in the year x, where x = 0 represents 1992. Write a linear equation that models the value of the automobile in terms of the year x.
A) y = -744x + 9420
B) y = - 1/744x - 9420
C) y = -744x + 13,140
D) y = -744x + 5700

Answer 1

anything?

Answer 2

try to test each given equation with x =5...it's kinda the last resort coz i forgot how to solve problems like this..sorry..

Answer 3

@jim_thompson5910 can you help?

Answer 4

do you know how to find the slope of a line if I give you two points?

Answer 5

yes

Answer 6

when x = 0, y = 13140

Answer 7

so plugging in x = 0 into choice A for example gives us

y = -744x + 9420

y = -744(0) + 9420

y = 0 + 9420

y = 9420

which is NOT the answer (we want y = 13140)

Answer 8

so choice A is out

Answer 9

oh

Answer 10

that's what they call trial and error XD..

Answer 11

so is it c.

Answer 12

try the given equation on letter be and see if it works... do the same for c and d...

Answer 13

it is C

Answer 14

yay! thank you guys!

Answer 15

Hottmess!, you need to go back to that question you think you finished, but didn't.