Two clearly defined lattice points on a line are $(-2,2)$ and $(2,-1)$. Determine the equation of the line in slope-intercept form.

• A. $y=-\frac{3}{4}x+\frac{1}{2}$
• B. $y=-3x+\frac{1}{2}$
• C. $y=\frac{3}{4}x-\frac{1}{2}$
• D. $y=-\frac{3}{4}x-\frac{1}{2}$

Answer: (A)