The function y = 4.99 + 1.89(x + 5) can be used to determine the cost in dollars for a monthly gym membership for x months. What is the rate of change of the cost, in dollars with respect to the number of memberships purchased?

a. she will receive a refund of $278.

step-by-step explanation:

$15.40 per mile

step-by-step explanation:

you have to round up to 4 because 6 is over 5 so you have to round the 3 up to 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