Answer:
9) 
10) 
Step-by-step explanation:
Slope-intercept form is
where
is the slope and
is the y-intercept, or <em>the value of y when the line crosses the y-axis.</em>
<u>Question 9</u>

The question tells us that the slope of the line is
. Because the slope is
, plug
into the equation as
.

Then, it tells us that the y-intercept is (0,4). Recall that the y-intercept is the value of y when the line crosses the y-axis. The value of y in the point (0,4) is 4. Because the y-intercept is
, plug 4 into the equation as
.

<u>Question 10</u>

First, we must calculate the slope using the slope equation:
when the given points are
and 
The given points are (0,-5) and (2,3). Plug those into the equation.

Two negatives make a positive

Therefore, the slope of the line is 4. Plug 4 into the original equation as
.

Now, we can find the y-intercept by simply looking at the graph. The line crosses the y-axis at the point (0,-5). Therefore, the y-intercept is -5. Plug -5 into the equation as
.

I hope this helps!