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Grade 8 Algebra: Evaluating Functions

Name: ______________________Date: ____________Score: ____ / 8

Level 2

Negatives, fractions and squares

1. Evaluate:
$f(x) = 2x + 3;\ f(-4)$
2. Evaluate:
$g(x) = -3x + 1;\ g(2)$
3. Evaluate:
$h(x) = x^2 + 1;\ h(-3)$
4. Evaluate:
$f(x) = \tfrac{1}{2}x - 2;\ f(-6)$
5. Evaluate:
$g(x) = x^2 - 2x;\ g(4)$
6. Evaluate:
$f(x) = -x + 8;\ f(-2)$
7. Evaluate:
$h(x) = \tfrac{3}{4}x;\ h(12)$
8. Evaluate:
$f(x) = 2x^2 - 5;\ f(3)$

$\text{Evaluating}$ $\text{Functions:}$ $\text{Free}$ $\text{8th}$ $\text{Grade}$ $\text{Math}$ $\text{PDF}$

$\text{A}$ $\text{function}$ $\text{assigns}$ $\text{exactly}$ $\text{one}$ $\text{output}$ $\text{to}$ $\text{each}$ $\text{input.}$ $\text{Ordered}$ $\text{pairs,}$ $\text{tables,}$ $\text{equations}$ $\text{and}$ $\text{graphs}$ $\text{show}$ $\text{these}$ $\text{relationships,}$ $\text{while}$ $\text{the}$ $\text{vertical}$ $\text{line}$ $\text{test}$ $\text{helps}$ $\text{identify}$ $\text{functions}$ $\text{and}$ $\text{graph}$ $\text{features}$ $\text{reveal}$ $\text{how}$ $\text{quantities}$ $\text{change.}$

$\text{Evaluating}$ $\text{Functions.}$ $\text{Level}$ $\text{2:}$ $\text{Negatives,}$ $\text{fractions}$ $\text{and}$ $\text{squares.}$