AlgebraMediumMissing table value for a linear function
Algebra practice question
The table shows values of a linear function g. x | g(x) −2 | 9 0 | 5 2 | 1 5 | ? What is the value of g(5)?
Answer: -5
The output falls by 4 for every 2 units of x, a slope of −2, and g(0) = 5: g(x) = −2x + 5. So g(5) = −10 + 5 = −5.
Common wrong answers
- If you answered 5
- 5 is g(0), the y-intercept.
- If you answered -1
- −1 is g(3), one more step of 2.
- If you answered -3
- −3 comes from subtracting 4 once more from 1, but 5 is 3 units past 2, not 2.
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