Posted by rmz on Friday, February 19, 2010 at 6:04pm.
The Egg Problem. A certain zoo kept records of the
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 6:55pm
We do not have the table to help you.

math  rmz, Friday, February 19, 2010 at 7:08pm
Ostrich 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 8:08pm
From 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 8:44pm
Yup, I think I got it

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