Question

Question 7

Review

1) Listen

A new bagel store opened. The first day 15 customers entered the store. The number of

customers that enter the store triples each day after. Which function represents f(d), the

number of customers that enter on the d day?

1.

f(d) = 3(15)

2.

f(d) = 3d + 15

3

f(d) = 150 + 3

f(d) = 15(3)

Submit Answer

Answer 1

`f(d) = 15 + 3d`

Explanation:

Given

`a = 15` --- day 1

`Rate = 3` -- i.e. triples daily

Required

Determine the function f(d)

The number of customers on a particular day is:

Customers = Day 1 + Rate * Number of days

Represent as a function:

`f(d) = a + Rate* d`

Where d is the number of days.

So, we have:

`f(d) = 15 + 3* d`

`f(d) = 15 + 3d`