E

The following situation can be described by a linear function. Draw a graph of the function and use the graph to answer the given quesion. Be sure to identify the independent and dependent variables. Then briefly discuss whether a linear model is reasonable for the situation described.   The amount of sugar in a fermenting batch of beer decreases with time at a rate of 0.2 gram per​ day, starting from an initial amount of 5 grams. When is the sugar​ gone?

Example 3. The solid waste generated in the cities of the US, W (in millions of tons), was 238 in 2000 and 250 in 2012. (a) Assuming W increases linearly, write a formula for W as a function of the year t. (b) Find and interpret both the slope and vertical intercept of W (t).