Lana is 12 years old. Her sister is y years
old. Lana is twice as old as her sister.
How old is Lana's sister?

Lana's sister is six.

Step-by-step explanation:

12/2= 6

Lana is two times her sisters age, so you have to divide Lana's age by two.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

i would say true? if the unit was informational and it "refreshed your understanding", then true.