The graph below shows three functions: graph of function f of x equals 2 to the power of negative x. graph of function g of x equals 5 to the power of x. graph of p of x is a line segment connecting points negative 1, negative 3 and 2, 12. which function has all real numbers as its domain?

The straight line is a polynomial. ALL polynomials have real numbers as its domain.

The exponential functions f(x) and g(x) both have the form b^x or b^(-x). Both these exponential functions have a real domain, but the range of both are limited to strictly positive numbers.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.