Question

Write a function rule based on the table below.

x f(x)
1 5
2 10
3 15




f(x) = x + 4


f(x) = 5x + 2


f(x) = 5x


f(x) = 5

Answer 1

`\large\boxed{f(x)=5x}`

Explanation:

`\begin{array}cx&f(x)\\1&5\\2&10\\3&15\end{array}\\\\\\f(1)=5(1)=5\\f(2)=5(2)=10\\f(3)=5(3)=15\\\Downarrow\\f(x)=5x`