Unit Rate
UNIT RATES ALWAYS BELONG ON THE ______________
BOTTOM
y = 54.2 x
k = 54.2
How do I know if a graph is Proportional?
1. Goes through the origin (0,0)
2. It is a straight line (linear)
This is her 3rd year
2/3 of a big mac has 250 calories. How many calories per serving (1big mac)?
k , y/x , unit rate, pattern,
LOOK AT MS. HOLM'S SCREEN
5 kg of cheese for $40
(1, 1.5) (2, 3) (3, 4.5)
What is the constant of proportionality?
k = 1.5
y = 1.5x
34.2 oz of chocolate for 8 people. What is the serving per person?
4.275 oz per person.
(2, 6) , (6, 18), (8, 24)
What is the constant of proportionality?
(remember y/x)
6/2 = 3
18/6 = 3
24/8 = 3
k = 3
LOOK AT MS. HOLM'S SCREEN
$8 per 1kg of cheese
Where did Ms. Holm grow up?
Renton, Washington!!
Ms. Holm makes 5.2 cups of punch for 8 people.
Mr. Lai makes 4.44 cups of punch for 6 people.
Whose serving has the most punch? By how much?
Ms. Holm: 0.65 oz for 1 person
Mr. Lai: 0.74 oz for 1 person
Mr. Lai has more punch per serving by 0.9 oz.
How do I know if a table is proportional?
LOOK AT MS. HOLM'S SCREEN
$8 per 1kg of cheese
(2,8)
(5,20)
(9, 36)
What is the equation (find k first)
y = ___ x
y = 4x
Ms. Holm is making a fruit drink. She uses 1/2 cups of apple juice and 1/4 cups of orange juice. How much orange juice is needed if she has 2 1/2 cups of apple juice.
1.25 or 1 1/4 cups of orange juice
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0 0
2 6.4
3 9.6
Find the Constant of Prop. (k)
Find the Equation
k = 3.2
y = 3.2 x
LOOK AT MS. HOLMS SCREEN
$48 for 6 kg of cheese
What were/ are Ms. Holm's dogs names?
Bear (rip) and Bobo