[tex]\begin{gathered} f(x)=4x \\ \text{where} \\ x=\text{Cans of soup} \\ f(x)=\text{Number of servings} \\ f(x)=4x \\ f(1)=4\times1=4 \\ f(2)=4\times2=8 \\ f(3)=4\times3=12 \\ f(4)=4\times4=16 \end{gathered}[/tex]
Where
x(cans of soup) = independent variable
Number of service(f(x)) = dependent variable
