Day 09 in Mat120

• Finished discussing inverse functions
  • Inverting an expression
  • Obtaining the graph of an inverse using a mirror and the line y=x.
• Using the CBL to obtain "ordinary functions"
  • Every time you take a drink from the fridge, an exponential function starts up.
  • We can use math modeling to "predict the future" (guess your temperature without waiting for the temperature to stabilize, by fitting the data with an exponential function).
  • Technology can be maddening!

• Distribute Section 2.1 and Section 2.2 Worksheets

• Return 1.3 problems

• No quiz opportunity (missed 2.1 worksheet); possible quiz next time on section 2.2.

• Roll

• No problems to collect

• Questions on old stuff?

• Section 2.1:

  • Q: "Are you a felon for consorting with known felons?"

    A: "In the limit!"

  • secants, tangents, limits

  • worksheet study questions (section summary)

  • Problems:
    • At seats: #4, p. 71

• Section 2.2
  • How many ways can we approach a real value in the domain?
  • What other "approaches" are we interested in?
  • Calculator tip for problems of type 19, p. 83.

Next time: Section 2.2