Question

the table shows how the total cost of the field trip depends on the number of students. What is a rule for the total cost of tickets? give the rule in words and as an algebraic expression
number of students Total cost
20 ( 12.20 +150
40 (12.40 + 150
60 (12.60 + 150

Answer 1

it seems to me if I use 0 students, I'd get the amount of 12.0 + 150
and for every student, it seems to be adding 0.01 amount, or 1cent

Answer 2

so for "x" amount of students, the total cost will be
$150 which is the overhead, amount to start from due to costs inhered
plus $12 + \(\bf \frac{x}{100}\)

Answer 3

\(\bf \cfrac{20}{100}=0.2 \qquad \cfrac{40}{100}=0.4 \qquad \cfrac{60}{100}=0.6\implies
\cfrac{x}{100}\)