Function Evaluation Worksheet
Evaluate functions for given input values and interpret function notation at an 8th-grade level.
Includes
Standards
Topics
Function Evaluation Practice
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Follow the instructions for each section. Show all your work when evaluating functions.
Evaluate the following functions for the given input values.
1. If f(x) = 3x - 5, find f(4).
2. If g(x) = x² + 2x - 1, find g(-3).
3. If h(t) = -2t + 7, find h(0).
Choose the best answer for each question.
4. In the function notation f(x), what does the 'x' represent?
The output value
The input value
The name of the function
A multiplication symbol
5. If f(x) = 10, which of the following statements is true?
The input is 10.
The output is 10.
The function is named 'x'.
The function is linear.
Determine if the following statements are true or false.
6. For the function f(x) = x + 3, if the input is 5, the output is 8.
True
False
7. The expression f(2) means to multiply the function 'f' by 2.
True
False
Complete the following sentences.
8. When we evaluate a function, we substitute the input value for the in the function's rule.
9. The result of evaluating a function is called the .
Use the graph below to answer the questions.
10. Find f(2) from the graph.
11. Find the value of x when f(x) = 3.