Practice problem
In which equation is yyy directly proportional to xxx?
−y=3x+2-y=3x+2−y=3x+2
y=−2x+5.5x+1y=-2x+5.5x+1y=−2x+5.5x+1
y=38xy=\frac{3}{8}xy=83x
y=2x−4y=2x-4y=2x−4
Type a concept, like “slope” or “photosynthesis”.