Which values of a, b, and c represent the answer in simplest form?

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

What is x and y intercepts for y=x+7

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20