Question

Dada a função f(x)=ax+5, determine o valor de "a" sabendo que f(1)=1

Answer 1

f(x)=ax+5

a(1) + 5 = 1 ==> a + 5 = 1 ==> a = 1 - 5 ==> a = - 4 
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f(x) = ax + 5 ==> f(x) = - 4x + 5

Answer 2

f(x)=ax+5
1=a1+5
a=1-5
a=-4