PP-DS166

[max999]

In the xy-coordinate plane, the slope of line l is 3/4. Does line l pass through the point (-2/3,1/2)?

(1) Line l passes through the point (4,4).
(2) Line l passes through the point (-4,-2).

answer: D

[Huang Hsin-Yi]

(Y1-Y2)=3/4(X1-X2)

if line I pass the point (-2/3,1/2), two points of line I must satisfy the formula.
(1) and (2) both have the other point, so you can check it out, therefore both are sufficient.