Describe the relationship between two quantitative variables in a contextual situation represented in a scatterplot using the correlation coefficient, least squares regression, and residuals as evidence.
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Jerry forgot to plug in his laptop before he went to bed. He wants to take the laptop to his friend’s house with a full battery. The pictures below show the screenshots of the battery charge indicator after he plugs in the computer.
Using your analysis of this data, make an estimate: When can Jerry expect that his laptop is fully charged?
Laptop Battery Charge 2, accessed on June 21, 2017, 11:44 a.m., is licensed by Illustrative Mathematics under either the CC BY 4.0 or CC BY-NC-SA 4.0. For further information, contact Illustrative Mathematics.
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