


Challenge 


Constant of proportionality:
The constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the constant of proportionality 
Hot Air Balloons: Determine the height of a hot air balloon over time based on a recursive condition.
Gretel's Goldfish: When will Hansel and Gretel have the same number of goldfish?
Bouncing Ball: Determine how high a ball rebounds with each bounce.


