What type of variation does this scenario represent? The length of time you charge your cell phone and the battery power
direct variation
inverse variation
joint variation
none of these
11. Multiple Choice
1 minute
1 pt
What type of variation does this scenario represent? The outside temperature and the number of layers of clothes you need to wear outside to feel comfortable
direct variation
inverse variation
joint variation
none of these
12. Multiple Choice
1.5 minutes
1 pt
What type of variation does this scenario represent? The grade you earn in a class and the number of assignments you complete and the number of hours you study
direct variation
inverse variation
joint variation
none of these
13. Multiple Choice
2 minutes
1 pt
What type of variation does this scenario represent? You and some friends decide to buy 2 pizzas and split the cost evenly. The number of friends who are sharing the cost of the pizzas and the amount of money you pay for your share.
direct variation
inverse variation
joint variation
none of these
14. Multiple Choice
5 minutes
1 pt
Suppose y varies directly as x. If y = 22.5 when x = 15, find y when x = 20.
1.5
337.5
30
16.875
15. Multiple Choice
5 minutes
1 pt
Suppose y varies jointly as x & z. If y = -180 when z = 15 and x = -3, then find y when x = 7 and z = -5.
-140
140
-4
4
16. Multiple Choice
5 minutes
1 pt
Suppose y varies inversely with x. If y = 150 when x = 2, find y when x = 25.