Answer
y=-2x+4
Work Step by Step
You have to put it into slope-intercept form.
Use two points (2,0)(1,2) and use the slope formula (m=$\frac{y2-y1}{x2-x1}$):
m=$\frac{2-0}{1-2}$=$\frac{2}{-1}$=-2.
The slope is -2.
Plug it into the slope-intercept form:
y=mx+b
0=2(-2)+b
b=4
Now, put the values into the equation:
y=-2x+4