A pair of shoes at a store costs $7.50. The total cost, in dollars is given by the function C(s) = 7.5s. What is the cost of 4 pairs of shoes?

A
$35

B
$30

C
$25

D
$50

the answer to this question is 3/19

step-by-step explanation:

it is true

step-by-step explanation:

all the combinations add up i used   calculator

step-by-step explanation:

total income = price of one ticket   *   number of tickets sold

  y                 =     4                                   x

so the equation is y=4x     with x≥0   because number of tickets sold can not be negative

thus the equation is a semi -line with an end point at

(0,0)

passing through :

x=1     y=4(1) = 4   so through (1,4)