Leroy took a trip to Alaska. His airfare was $243 and he spent $72 each day while he was there. Which expression can he use to help him find the cost of the trip?
(x = number of days spent in Alaska) *

72x+243

Step-by-step explanation:

That expression will get you the total amount of money spent

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.