AlgebraHardLater value from two known values
Algebra practice question
A linear function g has g(1) = 10 and g(5) = 18. What is the value of g(9)?
Answer: 26
The slope is 8/4 = 2, so g(9) = 18 + 2(4) = 26.
Common wrong answers
- If you answered 20
- 20 adds 2 once.
- If you answered 22
- 22 adds one step of 2 to 18 twice, or uses slope 1.
- If you answered 34
- 34 uses slope 4.
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