Question

The table below shows the amount of money, in thousands of dollars, Amelia has saved after different numbers of years:


Years (x) 1 2 3 4 5 6
Money (y) (thousands of dollars) 40 80 120 160 200 240


Identify the function that represents Amelia's savings and the amount that Amelia will have saved in 7 years.
y = x + 40, in 7 years she will have saved $47,000
y = x + 240, in 7 years she will have saved $247,000
y = 40x, in 7 years she will have saved $280,000
y = 6x, in 7 years she will have saved $42,000

Answer 1

@Vocaloid

Answer 2

first find the relationship between y and x

Answer 3

how

Answer 4

when x = 1, y = 40
when x = 2, y = 80
when x = 3, y = 120

do you see the pattern between x and y?

Answer 5

40

Answer 6

right, but we need to write it in terms of x and y

y = __x

fill in the blank

Answer 7

40

Answer 8

@Vocaloid

Answer 9

so our complete expression is...?

Answer 10

C

Answer 11

right