Writing a Function Rule
• define function notation
• write function rules
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Function Notation: 2
What do you do to x to get y?
x
y
­1
­2
2
4
7
14
15 30
3
4
x
y
­2
12
2
8
9
1
16
­6
5
Word problems
Suppose on average a professional basketball player can make 9 times the amount of free throws you can make. Write a rule for how many free throws the professional basketball player can make.
6
A video store is going out of business. They are running a special on DVDs. All DVDs cost $8, but every DVD you buy after the first one cosh $2 each. Write a rule to describe the cost of DVDs.
7
Homework: pg 81­82 # 2­28 even 31­33
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