At 1:00 pm, Ryan realizes his computer has been unplugged. He needs to work on the computer in his car and wants it to be fully charged. The image on the right represents the time it took for the laptop to charge.

Resources:

• Desmos Guide
• Regression Tool
• Line of Best Fit video

1. When can Ryan expect his laptop to be fully charged?
2. He does a quick calculation at 1:17 and estimates the computer charges 1% a minute. He estimates it will be fully charged by 2:30. Was he right?
3. Was his prediction over or under?
4. Graph all the data points. Draw an original graph or use a digital graphing calculator.Hint: First, convert the minutes to decimals, then create a table of values.
5. Use the regression tool onDesmos.com(see theDesmos guide) to graph the points on a line or draw your own. Write a line of best fit in the formy = mx + b.
6. Based on the line of best fit, when will the computer be fully charged?
7. Was your first estimate correct? Why do you think Ryan's first estimate was not accurate?