Question 51677
f(x)=ax+b
put x=2
f(2)=a*2+b=1
    =2a+b=1  ...............(1)
put x=-3
f(-3)=a*-3+b=11
     =-3a+b=11  .............(2)
(1)-(2)...5a=-10
       a=-2
put a=-2in (1)
      2*-2+b=1
      -4+b=1
        b=1+4
        b=5

so,f(x)=-2a+5