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What is (1, 7.7) and (6, 9.2), where x represents the number of weeks, and y represents the baby's weight, in pounds. Thanks

 Apr 16, 2015

Best Answer 

 #2
avatar+130516 
+5

I am assuming that you want to write an linear equation to model this. Let's find the slope, first. We have...

 (9.2 - 7.7) / (6 -1)   =  1.5/5  = 3/10

So....using the point-slope form, we have

y - 7.7 = (3/10) (x - 1)   simplify

y = .3x - .3 + 7.7  

y= .3x + 7.4

Here's a graph.......https://www.desmos.com/calculator/bqjdf69f6j

Of course, the graph is only good for x ≥ 0

 

 

  

 Apr 16, 2015
 #1
avatar
0

hmm I think the y at 1 would be 1.533(3s repeat).

 Apr 16, 2015
 #2
avatar+130516 
+5
Best Answer

I am assuming that you want to write an linear equation to model this. Let's find the slope, first. We have...

 (9.2 - 7.7) / (6 -1)   =  1.5/5  = 3/10

So....using the point-slope form, we have

y - 7.7 = (3/10) (x - 1)   simplify

y = .3x - .3 + 7.7  

y= .3x + 7.4

Here's a graph.......https://www.desmos.com/calculator/bqjdf69f6j

Of course, the graph is only good for x ≥ 0

 

 

  

CPhill Apr 16, 2015

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