Question 613240
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, 
At 10 weeks old a puppy weighs 9 pounds. At 30 weeks old the puppy weighs 24 pounds
(30,24)
(10,9)   m = {{{13/20}}}
 y = (13/20)x + b
 9 = (13/20)10 + b
 5/2 = b
 {{{y = (13/20)x + 5/2}}} when born (x=0) weighed 2.5 lbs
{{{30 = (13/20)x + 5/2}}}
   {{{(55/2)(20/13)= x}}}
    At 42.3 wks, puppy will weigh 30lbs
{{{drawing(300,300,   -3,60,-3,40,  
 grid(1),
circle(42.3, 30,0.8),
circle(10, 9,0.8),
graph( 300, 300, -3,60,-3,40,0,(13/20)x + 5/2))}}}