Transcript DAY 63 - 11.22.10 - functions pt3

BELLRINGER (DAY 63)
Number
Operations
Algebra
Geometry &
Measurement
I am a fraction equivalent to 2/5. My numerator is 21 less than
my denominator.
Write a variable expression for “9 more than twice p”.
How many centimeters are in 8 meters?
Data, Statistics
& Probability
Jeff flips a fair coin and then rolls a fair number cube.
What is the probability of getting a heads on a fair coin
toss and a 6 on a fair number cube roll?
Potpourri
Give two numbers which when added together produce
the same answer as when they are multiplied together.
If you played in a band, which
instrument would you play?
RA – guitar
LA – drums
LL – lead singer
RL – cowbell
If you know what seven hundred
twenty divided by ninety is.
RA – I don’t know
LA – I know
What do you like about the
Thanksgiving Holiday?
RA – Eating
LA – Hanging with family/friends
LL – No school
RL – Football
A sixteen dollar shirt is reduced by twentyfive percent. How much does it cost now?
RA – I don’t know
LA – I know
If you were an author, what type of
book would you write?
RA – Love stories
LA – Mystery/Suspense
RL – Fantasy
LL – Something else
Tarrell has a collection of nickels. He has
four dollars and thirty cents. How many
nickels does he have?
RA – I don’t know
LA – I know
Vocabulary:
function is the pairing of one number to
A __________
another, using a pattern or rule.
input
The __________
(x) is the number you start
with (part of the problem).
The __________
(y) is the number you end
output
with (part of the solution).
domain
All the input values are called the _________.
All the output values are called the _________.
range
In a race, Arbra runs 2 miles
for every one of Austin’s.
If they continue that pace,
how many miles will Arbra
run if Austin runs 3 miles?
5 miles? 20 miles?
What is the function/rule?
y = 2x
Input
(x)
Output
(y)
1
2
2
4
3
6
5
10
20
40
You just got a summer job.
For every $4 you make,
Uncle Sam takes 1. How
much will Uncle Sam take
if you make $12? $60?
$200?
What is the function/rule?
y = x/4
Input
(x)
Output
(y)
4
1
8
2
12
3
60
15
200
50
How to solve if given the function:
Input x
5
7
9
11
15
Output y
11
19
27
35
51
y = 4x – 9 and x = 5; 7; 9; 11; 15
Solve by replacing the variable with its value
Closure
How/Why do you think functions could be
used in the business world?