Suppose Jake is running a 15 mile race. Jake runs at a constant speed of 2 miles every 8 minutes. Let x be the number of minutes that have passed since Jake has started the race. Let y be the number of miles between Jake and the finish line of the race. (a) What is the constant rate of change, m, in the above situation? (b) Write a formula for ∆y in terms of ∆x. (c) Write a formula for y in terms of x (d) In words, what does the point (8, 13) represent on the graph? (e) find the horizontal intercept of the graph, and describe its meaning, in words, the the context of the above situation.

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