anonymous
  • anonymous
Calculate the average rate of change for the given graph from x = –2 to x = 0 and select the correct answer below.
Algebra
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
http://assets.openstudy.com/updates/attachments/55a2e3d0e4b0564dd2d8a3cb-the_yee_dinosaur-1437084739640-03_04a_05.gif
anonymous
  • anonymous
Courtesy of Texas Instruments 0 1 –1 –2
anonymous
  • anonymous

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anonymous
  • anonymous
Baby_Bear69
  • Baby_Bear69
idk , i'd be guessing C
anonymous
  • anonymous
C is always my first guess
anonymous
  • anonymous
anonymous
  • anonymous
Baby_Bear69
  • Baby_Bear69
Baby_Bear69
  • Baby_Bear69
Haha we tagged him at the same time
anonymous
  • anonymous
Do you know the formula for the average rate of change?
anonymous
  • anonymous
no
anonymous
  • anonymous
\[M = \frac{ {y2}-y1 }{ x2-x1 }\]
anonymous
  • anonymous
so -1-(-1) 0-2
anonymous
  • anonymous
2,-2
anonymous
  • anonymous
or just -2
anonymous
  • anonymous
So they're asking for the average rate of change from x = -2 to x = 0. So we have two ordered pairs. (-2, y1) and (0, y2). On the graph it shows that the y's are both -1. So yes you plug in the ordered pairs into the formula. \[M = \frac{ -1 - (-1) }{ 0 - (-2) }\]
anonymous
  • anonymous
im still confused
anonymous
  • anonymous
What part are you confused on? I'll try to clear it up. :)
anonymous
  • anonymous
when i solved the formula i got 2 and that isent one of the answer choices
anonymous
  • anonymous
You shouldn't get an ordered pair when you solve it. Also, when you put -1 - (-1) 0-2. You forgot that the 2 is also negative so it'd actually be 0 - (-2). The subtraction signs become addition/positive of course. So your equation becomes \[M = \frac{ -1+1 }{ 0 + 2 }\]

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