Question

olve.

The average value of a certain type of automobile was $13,320 in 1995 and depreciated to $4020 in 2000. Let y be the average value of the automobile in the year x, where x = 0 represents 1995. Write a linear equation that models the value of the automobile in terms of the year x.
A) y = -1860x + 4020
B) y = - x - 4020
C) y = -1860x + 13,320
D) y = -1860x - 5280

Answer 1

This is just a simple y = mx + b problem

Answer 2

k thankS

Answer 3

d i s t a n c...

Answer 4

wait may be different on this one. ummm..slope formula.

Answer 5

You mean y = mx + b

Answer 6

I'm going to plug the points into y = mx + b

Answer 7

ya but gotta find my m : )

Answer 8

Well, actually, x = 0 was supposed to be 1995

Answer 9

But at least we have the slope

Answer 10

I was supposed to use (0, 13320) and (5, 4020) as the points

Answer 11

yeah so the equation is?

Answer 12

i think its c

Answer 13

y = mx + b

13320 = 0m + b
4020 = 5m + b

Isolate b in both to get

b = 13320

b = 4020 - 5m

13320 = 4020 - 5m
13320 - 4020 = -5m
9300 = -5m
9300/-5 = m
-1860 = m

y = 1860x + 13320

Answer 14

y = -1860x + 13320

Answer 15

haha i was right!

Answer 16

Yes, but I showed the work. You should appreciate my methods. My methods are direct application of basic algebraic formulas

Answer 17

I don't need to use silly distance formula for slope formula which are really sideline formulas.

Answer 18

yes i had learn that method to but i also went with my instincts lol

Answer 19

y = mx + b and a^2 + b^2 = c^2 are the main formulas

Answer 20

thank you! yes i learned the slope method to.

Answer 21

I bet even @UsukiDoll learned something here. Probably never seen a problem solved in this manner before.

Answer 22

This problem doesn't exist in Calculus deary.

Answer 23

lol, of course it doesn't because it is an Algebra problem.

Answer 24

I'm familiar with Calculus to btw

Answer 25

My strange methods are also used there as well

Answer 26

so for the mx+b this question ask Use the given conditions to write an equation for the line in slope-intercept form.

Slope = 2, passing through (-8, 8)
A) y - 8 = x + 8
B) y = 2x + 24
C) y = 2x - 24
D) y - 8 = 2x + 8
So do i work it all the way out thus getting c or do i stop at d

Answer 27

Actually, all you have to do is just insert the points into the formula

y = mx + b

Answer 28

sorry I gotta practice my own probs before I go to bed.

Answer 29

I did so its D.

Answer 30

So let's try it

y = mx + b
8 = 2(-8) + b

8 = -16 + b
8 + 16 = b
24 = b

y = 2x +24

Answer 31

I thought u dont work it all the way out

Answer 32

Why wouldn't you?

Answer 33

We had everything. All we had to do is find b. Notice that my result is one of the answer choices.

Answer 34

As I always say, all you need is y = mx + b

Answer 35

oh ok slope interc. thank you yes that was one of my choice i was just confused.