The expression is f(x) = 7x5 + x - 1.
\
In the given expression exponents of x is 5.
So, the expression is not linear.
This is not a linear function because x has an exponent other than 1.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")