4.5 Writing a Function Rule
Objective: SWBAT write a function
rule given a table or a situation.
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Write a Function Rule (Table). Step: 1. Find a pattern. Think, “how did they get from x to y?” 2. Write an equation from the pattern.
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4.5 Writing a Function Rule
Objective: SWBAT write a function
rule given a table or a situation.
Write a Function Rule (Table)
Step:
1. Find a pattern. Think, “how did they
get from x to y?”
2. Write an equation from the pattern.
3. Check the equation for a couple of
domain values.
Write a Function Rule (Table)
- (^) x y
- 1 - 3 0 - 4 1 - 5 2 - 6 x y 1 - 1 2 0 3 1 4 2 y = x – 2 x f(x) 1 3 2 6 3 9 4 12
f(x) = 3x y = - x – 4
Write a Function Rule
(Situation)
Step:
1. Define your variables (2).
2. Write an equation according to the
situation.
3. Check the equation.
Write a Function Rule
(Situation)
Write a function rule for each situation.
8. The height f ( h) of an object in feet
when you know the height h in inches.
f ( h) = height in feet
h = height in inches
f ( h) = h/
Write a Function Rule
(Situation)
Write a function rule for each situation.
9. The area A ( n) of a square when you
know the length n of a side.
A( n) = area of sqaure
n = length of side
A ( n) = n
2