Question

Given the function f defined by the formula f(x)=2x+1 find the following

Answer 1

$f(4)=2\cdot4+1=9\\ f(-5)=2\cdot(-5)+1=-9\\ f(0)=2\cdot0+1=1\\ f\left(\dfrac{1}{2}\right)=2\cdot\dfrac{1}{2}+1=2$

Answer 2

This is my answer to help you, go to the picture I uploaded.