Between which two months did the greatest change in her savings account during the past six months on the line graph

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?