The document discusses finding the sum of two functions f(x) and g(x). It provides two examples: 1) f(x)=x^2 and g(x)=2. The sum function h(x)=x^2+2 is graphed by adding the y-values. 2) f(x)=x^2 and g(x)=3x. The sum function p(x)=x^2+3x is graphed by adding the y-values. The domain is all real numbers and the range is all real numbers greater than -9/4, as determined by finding the midpoint of the function.