Question

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Explanation:

Step1: Recall slope-intercept form

The slope-intercept form of a line is $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept.

Step2: Identify m and b for Q9

Rearrange $y=-7+2x$ to $y=2x-7$.
Compare to $y=mx+b$:
$m=2$, $b=-7$

Step3: Identify m and b for Q10

Rewrite $y=3-\frac{1}{2}x$ to $y=-\frac{1}{2}x+3$.
Compare to $y=mx+b$:
$m=-\frac{1}{2}$, $b=3$

Answer:

For question 9:

$m = 2$
$b = -7$

For question 10:

$m = -\frac{1}{2}$
$b = 3$