Which statement shows the rule for the relationship
between the two quantities?

Which number produces a rationale number when multiplied by 1/5

Which expression gives you the distance between the points (5,1)and(9,-6)

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )