Answer
$y=\frac{–1}{2}x+1$
Work Step by Step
Using line form $y = mx + b$
The line crosses the y-axis at $y=1$ so $b=1$.
Thus, our equation is $y=mx+1$
Use the point $(2,0)$ to substitute into the equation to obtain:
$y=mx+1$
$=> 0=m(2)+1$
$m = \frac{–1}{2}$
Thus the equation is: $y=\frac{–1}{2}x+1$