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Gilbert is training for a bike race. As part of his training, he does practice rides on portions of the actual race course. Gilbert's first practice ride

covers 5 miles of the course, and his second practice ride covers 9 miles of the course. Between these practice rides, he increase his average speed by 2 miles/hour .

The denominator of the function that models practice ride 2 represent the

A . Increase in Gilbert’s average biking speed

B. Distance Gilbert’s travels

C . Time it takes Gilbert’s to travel 5 miles

D . Biking speed for the second practice ride .

To find a function that models the total amount of time Gilbert spend doing practice rides on the race course

A . Add

B. Multiply

C . Divide

D . Subtract

The functions