It is a linear function because the y-values increase by an equal difference over equal intervals of x-values.
What is linear function?
In calculus and related areas, a linear function is a function whose graph is a straight line, that is, a polynomial function of degree zero or one.
As we have the function varies as
X Y
1 26
2 44
3 62
4 80
5 98
Here as the value of x is vary with 1 then the value of y varies by 18.
So It is a linear function because the y-values increase by an equal difference over equal intervals of x-values.
To know more about linear function follow
https://brainly.com/question/4025726
#SPJ2