Tricia reads $20$20 pages of her book in $2$2 hours.
Which of the following is the unit rate of pages per hour?
$10$10 pages/hr
$2$2 pages/hr
$20:2$20:2
$10:1$10:1
A tap fills up a $180$180 liter tub in $3$3 hours.
The following table represents a proportional relationship.
Find the constant of proportionality.
In Iain's chocolate drink, the relationship between $t$t teaspoons of cocoa and $c$c cups of milk is shown on the graph.