1.

Prove that the straight line joining the points (-1, 3) and (4, -2) passes through the point

Answer»

the equation of straight line passing through (-1,3) and (4,-2) is( y-3) = (4+1)/(-3-2)*(x+1) => y-3 = -x-1=> y = -x+2

now put a and b in this line as x and y => b = -a +2 ==> b+a = 2.

this holds true.

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