Which statements can be used to describe the original functions f(x) and g(x)? Select two options.

When added, the sum of the y-intercepts must be 1.
When multiplied, the product of the y-intercepts must be –15.
Either f(x) or g(x) has a positive rate of change and the other has a negative rate of change.
f(x) could have a rate of change equal to 1 and g(x) could have a rate of change of 2.
f(x) could have a rate of change equal to 2 and g(x) could have a rate of change of –6.