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Algebra Difficulty 1.3 Junior Find the answer Canada

The line with equation $y = 2x +
b passes through the point (-4,0) $. The value of$ b$ is

Pick one

Solution

Since the line with equation $y = 2x +
b passes through the point (-4,0)$, the coordinates of the point must
satisfy the equation of the line.

Substituting $x=-4$ and $y=0$ gives $0 =
2(-4) + b $and so$ 0 = -8 +
b $which gives$ b = 8$.

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.