Answer
y=1.5x-2
Work Step by Step
You have to put it into slope-intercept form.
Use two points (2,1)(0,2) and use the slope formula (m=$\frac{y2-y1}{x2-x1}$):
m=$\frac{1-(-1)}{2-0}$=$\frac{3}{2}$=1.5
The slope is 1.5. Plug it into the slope-intercept form:
y=mx+b
1=1.5(-2)+b
b=-2
Put the values into the equation: y=-1.5x-2.