Posted by **Anonymous** on Tuesday, May 21, 2013 at 2:50pm.

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?

- help -
**Steve**, Tuesday, May 21, 2013 at 3:30pm
a+2b = 4.25

a+7b = 8.50

(a,b) = (51/20,17/20)

so,

y = 2.55 + .85x

- math -
**z**, Tuesday, June 16, 2015 at 12:29pm
. 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?

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