AlgebraVery hardy-intercept from a value and a difference
Algebra practice question
For a linear function g, g(1) = 5 and g(3) − g(1) = 8. What is the y-coordinate of the y-intercept of the graph of g?
Answer: 1
The slope is 8/2 = 4, so g(0) = 5 − 4 = 1.
Common wrong answers
- If you answered 5
- 5 is g(1).
- If you answered 13
- 13 is g(3).
- If you answered -3
- −3 uses a slope of 8.
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