AlgebraMediumSlope plus intercept from standard form
Algebra practice question
When the equation 5x − 2y = 10 is written in the form y = mx + b, what is the value of m + b?
Answer: -2.5 or -5/2
−2y = −5x + 10 gives y = (5/2)x − 5, so m + b = 5/2 − 5 = −5/2.
Common wrong answers
- If you answered 0
- 0 uses m = 5 and b = −5, forgetting to divide the x-term.
- If you answered 7.5
- 7.5 uses b = 5, missing the sign when dividing by −2.
- If you answered -2
- −2 uses m = 3 from an arithmetic slip.
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