The domain of an absolute value parent function is always all real numbers

true or false

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

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

answer is a.

13.268

hope you get it right.