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For the first question, I think it might be A or D but I'm not sure. The second one I think is A but I'm probably wrong because I'm not very good with the rate of change. The last one, I have no idea what the answer could be. Maybe D? Help me please because I really need to understand these. Sorry. Thank you. Also, the pictures won't stay small so sorry for them being big. Tried changing them three times.

 Oct 23, 2019
 #1
avatar+106539 
+2

First one.....the avg rate of change is just the slope of the line

We have the points  (-5, -4)  and (3,8)  on the graph

The slope  is

[ 8 - - 4 ] / [ 3 - - 5]  =

 

[ 12 ]/ [8]   =

 

12/8  =

 

3/2  =  

 

1.5

 

cool cool cool

 Oct 23, 2019
 #2
avatar+106539 
+2

Second one

 

We have the points  ( 9, 75) and (13, 95)

 

"D"  is correct

 

 

 

cool cool cool

 Oct 23, 2019
 #3
avatar+106539 
+2

Last one

 

Let     w  be the graph

 

y  =   l (2/3) x  l 

 

Then  3w  =

 

y  =  3 l (2/3) x l   =   l 3 *(2/3) x l   =  l 2x l   =  2  l x  l  

 

So  "B"  is correct

 

 

cool cool cool

 Oct 23, 2019

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