AlgebraMediumFunction with a fractional rate
Algebra practice question
The linear function g is defined by g(x) = (1/4)x + 6. For what value of x is g(x) equal to 8?
Answer: 8
Set (1/4)x + 6 = 8. Subtract 6: (1/4)x = 2. Multiply by 4: x = 8.
Common wrong answers
- If you answered 2
- 2 is (1/4)x, one step short. Multiply by 4.
- If you answered 32
- 32 is 8 × 4, skipping the subtraction of 6. First (1/4)x = 8 − 6 = 2.
- If you answered 0.5
- 0.5 is 2 divided by 4 — the 2 should be MULTIPLIED by 4 to undo the 1/4.
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