Answer: Yes, it is a linear function.
Explanation:
The linear function in Slope-Intercept form is:
![f(x)=mx+b](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6y17ezrpv7ir4zbcfli9dye6jyqxdod420.png)
Where m is the slope and b the y-intercept.
In this case, given the following function:
![f(x)=(x+5)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/nm8fq8nl78714lm0j9ezjxsan0udin6lt5.png)
You can observe that it has the form
![f(x)=mx+b](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6y17ezrpv7ir4zbcfli9dye6jyqxdod420.png)
You can identify that:
![m=1\\b=5](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y5khxeomiwpx28a5bg6qzmaw1xwnqc9f71.png)
Therefore, you can conclude that it is a linear function.