, the limit at a point is the same as the output at that point. This video explains these rules.

How Do You Find the Limits of Some Well-Known Functions?

For the three functions f(x)= c, g(x)= c × x, and h(x)= c × e ˣ, the limit at a point is the same as the output at that point. This video explains these rules. 

A function is a relationship between two — or more — variables. If you input a number into a function, it can only output one value.

The output variable of a function, often named y

The input variable of a function, often named x

L is the limit of the function f at the point a if: the output goes towards L as the input gets closer to a.