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March 3, 2015

Posted by **rmz** on Friday, February 19, 2010 at 6:04pm.

relationship between the weight of a mother ostrich and

the weight of her egg. Data for three birds is shown in

the next table.

a. Estimate the weight of an egg from a mother ostrich

weighing 175 lbs.

b. How much would you expect the egg to weigh from

a mother ostrich weighing 190 lbs?

- math -
**PsyDAG**, Friday, February 19, 2010 at 6:55pmWe do not have the table to help you.

- math -
**rmz**, Friday, February 19, 2010 at 7:08pmOstrich 1 Ostrich 2 Ostrich 3

Weight of Mother 120 lbs. 160 lbs. 180 lbs.

Weight of Egg 2.4 lbs 3.2 lbs 3.6 lbs

Sorry about that.

- math -
**Reiny**, Friday, February 19, 2010 at 8:08pmFrom your data, form three ordered pairs

(120,2.4), (160,3.2) and (180,3.6)

there is a linear relation between the 3 points, they lie in a straight line.

So you can find the equation of egg weight (e) vs ostrich mother weight (w)

the slope between any two of the three points is .02

so e = .02w + b , (using the standard y=mx+b )

using (120,2.4)

2.4 = .02(120) + b

b = 0

so e = .02w ---- a direct variation.

so for a) sub in 175 for w to get

e = .02(175) = 3.5

You do b), ok?

- math -
**rmz**, Friday, February 19, 2010 at 8:44pmYup, I think I got it

- math -
**candy**, Thursday, July 7, 2011 at 1:55pme = .02(190) = 3.8 right?

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