# help

posted by Anonymous

a 2-mi cab ride costs \$4.25. a 7-mi cab ride costs \$8.50. which equation models the cost y of a cab ride that is x miles?

1. Steve

a+2b = 4.25
a+7b = 8.50
(a,b) = (51/20,17/20)

so,

y = 2.55 + .85x

2. z

. Which ordered pair could you remove from the relation {(–2, –1), (–1, 1), (–1, 0), (0, 1), (1, 0)} so that it becomes a function?

3. makayla

The time t required to drive a certain distance varies inversely with the speed r. If it takes 2 hours to drive the distance at 30 miles per hour, how long will it take to drive the same distance at 50 miles per hour?

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