Question

Manuel builds and sells wooden crates. He made a table to show how much his crates cost.



Which equation represents the situation?



Manuel’s Crates

Crates: 2 4 6 8
Cost: 25 45 65 85

A.

y – 2 = −10(x – 25)


B.

y – 4 = 10(x – 45)


C.

y – 65 = −10(x – 6)


D.

y – 85 = 10(x – 8)

Answer 1

I think its D or B, I could use a second opinion

Answer 2

@superdavesuper I think its D or B

Answer 3

If we try and write it like an equation, we can call 'crates' our x value and 'cost' our y value.

Take any two points from your data set e.g. (2, 25) and (4,45)

Now slope (m) = change in y / change in x
m = (45-25)/(4-2)
m = 20/2
m = 10

We can write equations as (y-b) = m(x-a) where m is the slope and (a,b) is any point
(y-85) = 10(x-8)

D

Answer 4

Thanks so much <3 :)

Answer 5

You're welcome :)