Question

solve, assuming a linear equation fits this situation.
The value of a graphing calculator is $225. After 2 years, the value of this calculator is $160. Find the value of the calculator after 5 years. (HINT: Let the time now be 0, the time in two years be 2, and time in five years be 5)

Answer 1

@iGreen

Answer 2

(0, 225)

(2, 160)

Those are your points.

Answer 3

The answer should be in $ o_o

Answer 4

Since, it must be a linear equation. So, it would be of the format:

y = ax + b

Here, y = value after x years

Answer 5

a = rate at which the value changes
b = value at 0 year.

Answer 6

It's not your answer.

Answer 7

Now, it is given that (0,225) and (2, 160) satisfy this equation.

Answer 8

I'm not sure what you want me to do with those points.

Answer 9

I mean x = 0 and y =225 ; x = 2 and y = 160 satisfy the equation.

Answer 10

Now, using these facts solve for a and b.

Answer 11

If I knew how I would.

Answer 12

I can put them in fraction form and cross multiply :D

Answer 13

So the answer is?....

Answer 14

Slope is (160-225)/2 = -32.5

So our equation is: f(x)=-32.5x+225

I can plug this into my graphing calculator and find out what x = 5 is.

When x = 5, y = 62.5.

Answer 15

o_o Math is hard. </3

Answer 16

Nah.

Is it multiple choice?

Answer 17

Nope. Answer should be in $ though.

Answer 18

Put in 62.50

Answer 19

I made a 40 on that test lololol.

Answer 20

But you got that right.

Answer 21

WAT

Which questions did you miss?

Answer 22

Not sure, I moved to the next test. Lol. We'll get it next time.