Question 178434
{{{f(x) = -4x+1}}} Start with the given function



{{{f(a+1) = -4(a+1)+1}}} Plug in {{{x=a+1}}}. In other words, replace each "x" with "a+1"



{{{f(a+1) = -4(a)-4(1)+1}}} Distribute



{{{f(a+1) = -4a-4+1}}} Multiply



{{{f(a+1) = -4a-3}}} Combine like terms.



So the answer is {{{f(a+1) = -4a-3}}}