Answer:
[tex]f(x)=1\cdot x+11[/tex]
Step-by-step explanation:
These situations are represented by linear equations since they are represented by an initial value and a constant rate of change. Linear functions are given as:
[tex]\begin{gathered} f(x)=mx+b \\ \text{where,} \\ b\text{ is the initial value} \\ m\text{ is the rate of change} \end{gathered}[/tex]
For truck 4, the initial value is 11 and it sells each taco for $1.
Therefore, the equation that describes the amount of money for truck 4:
[tex]\begin{gathered} f(x)=1\cdot x+11 \\ \text{where, } \\ x\text{ is the amount of tacos sold} \end{gathered}[/tex]
