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December 20, 2014

December 20, 2014

Posted by **Anonymous** on Tuesday, October 21, 2008 at 6:42pm.

plz explain the work .....

- math -
**alisha**, Tuesday, October 21, 2008 at 6:43pmplz...help

- alisha -
**Reiny**, Tuesday, October 21, 2008 at 6:56pmlook at it as ordered pairs of the form

(time, height)

you are given 2 such points, namely

(1,12) and (4,10.5)

slope = (10.5+12)/(4-1)

= -1.5/3 = -.5 or =1/2

using height = m(time) + b (remember y=mx+b ?)

and using the point (1,12)

we get

12 = -(1/2)(1) + b

b = 12.5

so height = -time/2 + 12.5

you want height to be 6

6 = -time/2 + 12.5

12 = -time + 25

time = 25-12

= 13

- alisha -
**Anonymous**, Tuesday, October 21, 2008 at 7:06pmthanks so so so much

- alisha -

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