Question

Which of the following is a linear function?

f(x) = 3/x + 12
f(x) = 3x2 + 12
f(x) = 3x + 12
f(x) = 3x + 12

Answer 1

last two are the same

Answer 2

both the same and both linear functions
look like
\[f(x)=mx+b\]

Answer 3

the third 1 was suppoed 2 br 3^x + 12

Answer 4

then it is the last one