Skills · Functions · Function Fundamentals
Evaluating function notation
Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.
Problem types
- a linear rule at a number: f(x) = 2x − 5: f(3)
- x² at a negative number: f(x) = x² − 3x + 1: f(−2)
- x from the output: f(x) = 2x − 5: x when f(x) = 7
- two functions in one expression: f(x) = 2x + 1, g(x) = x − 4: 3f(2) + g(5)
Sample Sheet · Level 1
- g(x) = 2x + 2: g(6) =
- h(x) = 2x − 3: h(−3) =
- f(x) = 4x + 1: f(−6) =
- g(x) = 2x − 8: g(−5) =
- g(x) = 3x + 9: g(1) =
- f(x) = 3x − 8: f(6) =
- g(x) = 3x − 5: g(−5) =
- g(x) = 4x + 5: g(−4) =
Answer key
- 14
- −9
- −23
- −18
- 12
- 10
- −20
- −11
Sample Sheet · Level 3
- h(x) = −4x − 3: h(−1) =
- h(x) = 6x − 2: h(−4) =
- f(x) = 6x − 7: x when f(x) = −31
- f(x) = −2x + 4, g(x) = 5x + 8: f(5) + g(6) =
- g(x) = −4x − 7: x when g(x) = −39
- h(x) = x² − 4x − 6: h(−3) =
- f(x) = −4x − 8, g(x) = 2x + 5: f(2) − g(−2) =
- g(x) = x² − 5x + 8: g(−2) =
Answer key
- 1
- −26
- x = −4
- 32
- x = 8
- 15
- −17
- 22
Make your own
Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.