Unit 5 - Lesson 9 - Grade 8: Illustrative Mathematics

When do you think the candle will burn out completely?

Is the height of the candle a function of time? If yes, is it a linear function? Explain your thinking.

Based on this information, estimate how long it will be after 95 minutes.

After 95 minutes, the shadow measured 38.5 cm. How does this compare to your estimate?

Is the length of the shadow a function of time? If so, is it linear? Explain your reasoning.

For which years is the model good at predicting the percentage of garbage that is produced?

For which years is it not as good?

For which years is the model good at making predictions?

For which years is it not very good?

Could this information be reasonably estimated using a single linear model?