Question

#19.
Apples at the local farmer's market cost $1.25 per pound.



Write a function rule
f that gives the total cost of apples in terms of the number of pounds,
x.

f(x)=
Number of pounds (x)
Cost of apples (f)
0
1
2
6
10
x

Answer 1

To write a function that gives the total cost of apples in terms of the number of pounds \( x \), we can set it up based on the cost per pound.

Given:
- Cost of apples = $1.25 per pound
- Number of pounds = \( x \)

The total cost \( f(x) \) can be calculated by multiplying the number of pounds \( x \) by the cost per pound, $1.25.

So the function rule can be defined as:

\[
f(x) = 1.25x
\]

This means that:
- For \( x = 0 \), \( f(0) = 1.25 \times 0 = 0 \)
- For \( x = 1 \), \( f(1) = 1.25 \times 1 = 1.25 \)
- For \( x = 2 \), \( f(2) = 1.25 \times 2 = 2.50 \)
- For \( x = 6 \), \( f(6) = 1.25 \times 6 = 7.50 \)
- For \( x = 10 \), \( f(10) = 1.25 \times 10 = 12.50 \)

Thus, the function rule is:

\[
f(x) = 1.25x
\]