Answer:

p=0 & q=2

Step-by-step explanation:

Line passing through(-1,4) & (2,1)

x+y=3 (many equations can be written like this)

you can verify it by putting values of coordinates.

if line passes through (p,3)

then it will satisfy the equation.

p+3=3

p=0

similarly

1+q=3

q=2