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:
\[ f(x) = 1.25x \]
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