Answer:
-2
Step-by-step explanation:
Linear equations are typically organized in slope-intercept form:
where m is the slope and b is the y-intercept (the value of y when the line crosses the y-axis). To solve this question, first, find the slope, then, plug one of the given points into the equation to isolate b.
<u>1) Find the slope (m)</u>
where the given points are
and 
Plug in the given points (0,-2) and (3,0)

Therefore, the slope of of the line is
. Plug this into
as m:

<u>2) Find the y-intercept (b)</u>

Plug in one of the given points: (0,-2) or (3,0)

Therefore, the y-intercept of the line AB is -2.
I hope this helps!