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Number lines

by sq720 » Mon Jun 08, 2009 1:56 pm
<---------------->
q r s t

of the four numbers represented on the number line above, is r closest to zero?
A.) q= -s
B.) -t < q

A.

can someone please explain how to do these types of problems; is there some concept i should know or its just a matter to plugging in numbers
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by ssmiles08 » Mon Jun 08, 2009 2:59 pm
we know the following order: q r s t

choice 1 tells us that r is equidistant to q and s

q(-)-----------(r)-------------(+)s

suppose q = -5; then s = 5

r is in between -5 and 5 which means it is closer to 0 than either q or s.

we can disregard t because it is placed after s; which means it is more farther than closer to 0.

Choice 2 doesn't tell us anything about the placement of r.

it just tells us that q is a negative number which is less than t.
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