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If `f(x)=ax+b` , where a and b are integers, f(-1)=-5 and f(3)=3 then a and b are equal toA. a=-3,b=-1B. a=2,b=-3C. a=0,b=2D. a=2,b=3

Answer» Correct Answer - B
We have f(x)=ax+b
f(-1)=a(-1)+b
-5=-a+b `" "....(i)`
and, f(3)=a(3)+b
3=3a+b `" "....(ii)`
On solving Eqs. (i) and (ii), we get
a=2 and b=-3


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