Question

If A(3 5 and B(1 4) lies on the graph of ax+by=7 find a and b

Answer 1

if A and B are on the line ax+by=7

then equation of the line of ab=>ax+by=7

AB equation is -x+2y=7(found from 2-point form of a line)

then we can see that a=-1 and b=2