NAME DATE
PERIOD
* Advanced battery usage
5296
100%
50%
0%
9 hr ago
8 hr left
a.
Write an equation for a model that fits the data in the image and gives the
percent of battery power, p, as a function of time since the phone was fully
charged, t. Show your reasoning.
If you get stuck, consider creating a table of values or a scatter plot of the data.
b.
Based on your function, what percentage of power would the battery have 4
hours after this image was taken? What about 5 hours after the image was
taken? Show your reasoning.
2.
Here are two more images showing the battery usage at two later times, before the
battery was charged again.
Advanced battery usage
Advanced battery usage