If you graph it, it looks linear.
Answer:
subtotal: $65.00
8% sales tax: $5.20
total: $70.20
Step-by-step explanation:
A rational number is any number that can be written <em>as a ratio of two integers</em>.
0.62 fits the bill, as it can be written as the ratio 62/100 (or simplified to the ratio 31/50)

First, solve

Substitute that into equation

Substitute y = 125 into

There were 235 adult tickets and 125 junior tickets.
Hope this helps. - M