Question

the cost for an upcoming field trip is $30 per student the cost of the field trip c, in dollars is a function of the number of students x
c(x)=30x

Answer 1

30

C(x) = 30x

30 = 30x

x = 30/30

x = 1 student

90

C(x) = 30x

90 = 30x

x = 90/30

x = 3 students

The possible for the function are 30 & 90.