Question

Apples cost $1.89 per pound. What equation shows the relationship between total cost (t), price (p), and pounds purchased (n)?

1.89 = nt

n⁄t = 1.89

1.89t = n

t = 1.89n

Answer 1

`t(n) = 1.89n`

Explanation:

From the given information

• 'p' denotes 'price per pound'

i.e. p = 1.89

• 'n' denotes the 'number of pounds purchased'

• 't' denotes the 'total cost '

Therefore, the equation becomes

`t(n) = pn`

as

`p=1.89`

so

`t(n) = 1.89n`

Verification:

If you want to purchase 1 pound apple

i.e.

`n=1`

Total cost would be:

`t(1) = 1.89 (1)`

t = $1.89 per pound