Question

Andrea receives a $40 gift card to use at a town pool. It costs her $8 per visit to swim. A

function relating the value of the gift card, v, to the number of visits, n, is v(n) = 40 - 8n.
a. Identify a reasonable domain of the function. Explain why you chose that
domain. (What are reasonable times to visit the pool?)
b. Given that domain, what is the range of the function?

Answer 1

The value of the gift card = v = $40

The visit to the skate cost = $8

The number of visits = n

∴ n = the value of the gift card over the cost of one visit to the skate

∴ n = v/8 = 40/8 = 5

Explanation:

The general function for relating the value of the gift card, v, in terms if the number of visits, n. ⇒⇒⇒ v = 8n