What is the range of exponential function g? A. g(x) > -6
B. g(x) < 10
C. g(x) < 0
D. all real numbers

Explanation:

We have a horizontal asymptote at y = -6. The graph approaches this horizontal line, but never crosses it (even though it appears to do so). So this is the sort of "electric fence" the graph cannot touch. The lower bound of the y values is y = -6, leading to the range being y > -6. Replace y with g(x) to get g(x) > -6.

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x