Pls Help! Which graph A, B or C?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Which graph of a hyperbola represents the equation 16x^2-y^2=16

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm. it decreased by the same amount each year. what was the change in grandpa ernie's height each year