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  • Back at school on Monday...
  • Have you checked your notes? Maybe something went wrong in your process?
  • I am still very confused...
  • y=-150(x-244) + 400  Average Rate of Change = -1
  • Instantaneous Rate of Change = ?
  • -2
  • Lexi, you are a genius!!!!!!
  • I got it! I forgot to calculate the Instantaneous Rate of Change! The instantaneous rate of change is -2
  • Yea...... Nope, I am very confused!
  • Well, look at these two lines. One is orange and one is purple. Can you see the difference between them?
  • The orange one is steeper than the purple one, but I still don't understand it?
  • Exactly, the purple line is the average rate of change. Whereas the orange line is the instantaneous rate of change! So when we were were approaching and passing that halfway point it felt steeper because.....? 
  • Because the value of the instantaneous rate of change was calculated as -2 which is larger than the average rate of change  
  • Haha, I see what you did there!... But seriously, are we done? I can't take much more math!
  • Correct! So during that "instant" of being halfway down, the drop felt faster! 
  • A few days later...
  • I got an A+ on the roller coaster assignment!
  • Yay, no more math and scary roller coasters!!!
  • A+
  • The End!
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