Question

Ravi is planning to buy concert tickets for himself and a small group of friends. The tickets cost $21 each plus a $5 transaction fee. Ravi is not sure yet which of his friends are going to the concert. How much can Ravi expect to spend on tickets?

Answer 1

x=1: f(1) = $26

x=2: f(2) = $47

x=3: f(3) = $68

Explanation:

The independent variable is the number of concert goers which we can call x. The function f(x) represents the total cost of the tickets. We can write:

f(x) = $21 * x + $5, where the * symbol represents multiplication

So the total costs are:

x=1: f(1) = $26

x=2: f(2) = $47

x=3: f(3) = $68

Answer 2

The independent variable is the number of concert goers which we can call x. The function f(x) represents the total cost of the tickets. We can write:

f(x) = $21 * x + $5, where the * symbol represents multiplication

So the total costs are:

x=1: f(1) = $26
x=2: f(2) = $47
x=3: f(3) = $68