16Hit1600
AlgebraMediumSum of a line's intercepts

Algebra practice question

For the line 5x − 2y = 20 in the xy-plane, what is the sum of the x-intercept and the y-intercept?

Answer: -6

The x-intercept is 20/5 = 4 and the y-intercept is 20/(−2) = −10, so the sum is −6.

Common wrong answers

If you answered 4
4 is the x-intercept alone.
If you answered 14
14 uses a y-intercept of 10, losing the sign.
If you answered -4
−4 subtracts the wrong way.

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