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Any help is appreicated. 

 Mar 5, 2020
 #1
avatar+21725 
+2

The midline of 10 rules out all of the choices except the last two.....

   normal period of sin fxn is 2 pi      if you divide 'x' by pi/2 you stretch the wave out by a factor of 2 /pi     2 pi *  2/pi =4

           so the last one is the correct one

 Mar 5, 2020
 #2
avatar+251 
+1

 

 Mar 5, 2020
 #3
avatar+21725 
+1

Pretty good....except you marked amplitude incorrectly on your drawing....it should be 1/2 of the wave height.

ElectricPavlov  Mar 5, 2020
 #4
avatar+251 
0

ahhh yes. you're right

vest4R  Mar 5, 2020

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