Question

Trinity is going to the movies with some friends and will pay for her own ticket plus her own and her friends' small popcorns. Her total cost is given by the following expression: 8.5 + 6x What does the 6x represent?

A. The total cost of the small popcorns
B. The amount of small popcorns she is buying
C. The total cost
D. The cost of the ticket

Answer 1

A. The total cost of the small popcorns

Explanation:

Let us suppose Trinity is going to the movies with
`x` number of friends, we know she will pay for only her own movie ticket hence cost of movie ticket will be a constant (say
`a`) for her expense and cost of popcorn will be price of one popcorn (say
`b`) multiplied by number of friends.

considering the situation, her expense will be given by the function-

`f(x) = a + bx`

comparing this with the given function
`8.5 + 6x`,
`6x` will be the total cost of small popcorns.