16Hit1600
AlgebraVery hardConstant for a parallel line a fixed distance above

Algebra practice question

In the xy-plane, the line y = 2x + c is parallel to the line y = 2x − 5 and lies 3 units above it. What is the value of c?

Answer: -2

Parallel lines with the same slope differ only in their intercepts. Three units above −5 is −2.

Common wrong answers

If you answered 2
2 has the sign wrong.
If you answered 3
3 is the distance, not the intercept.
If you answered -8
−8 is 3 units below.

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