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MATH 1113 PreCalculus Section 5.3 notes
Introduction to Exponential functions
Suppose that are dreaming and I offer to pay you each day for attending class! Being even more generous in
dreamland, I offer you a choice:
Choice 1 – Receive $1,000 per class attended.
Choice 2 – Receive 2 cents on the first day you attend class,
4 cents the second day, 8 cents the third day, and so on.
Before we go on, which choice do you choose? _____
1. Determine a formula for choice 1
2. What kind of equation did you create? ___________
3. How much money would you get for attending:
a) 10 classes ________________________
b) 20 classes ________________________
c) 30 classes ________________________
4. Draw a graph of the money you make over 30
classes.
y
x
1. Let’s determine a formula for the amount of money
you would receive on the xth day.
Class Amount received Formula?
0
1 2 cents
2 4 cents
3 8 cents
4
5
.
.
.
x
2. The equation _________________ is an
_________________ function.
3. How much money would you get for attending:
a) 10 classes _______________________
a) 20 classes ______________________
b) 30 classes _______________________
4. Draw a graph of the money you make over 30
classes.
y
x
