Unit 4

What will we learn in unit 4?

• Ratios
• Scale Factors (C.O.P)
• Percents
• Unit Rates
• Proportional Relationships

Words you need in Your head

• C.O.P: A number that is constantly being used in a Proportional Relationship.
• Proportional Relationship: A Proportional relationship or P.R. is a relationship between two variables.

More words you need in your head

• Tip: If you go to a restaurant and you pay a Tip your tip will be a percentage of the total amount.
• Percent: A percent is an amount out of 100. With percents you will see this sign. %

Formulas

• The main formula you will be using for this unit is Y = KX. Y is based off of K and X.
• K is the C.O.P
• X is whatever your going to multiply by K to equal Y

Sixth grade relationships

• Sixth grade you learn about Perncents.
• Worked on multi - step problems.

Pretest
Jimmy rides at 3 miles In one hour. Find how many miles he will ride in 5 hours? (Hint: Y=KX)
In one hour he is 90% away from his destination. How many miles will Jimmy ride to get to his destination?

Major Concepts

• Percents
• C.O.P
• Proportional relationships

Percent

• A mattress costs 325$. The store bought the mattress for 250$
• How much did the price increase?
• The store discounts it by 35%.
• What is the new price?

C.O.P

• C.O.P can and will be used for Scale Drawing, finding speed and time.
• The size of a wall is 100 meters long. How long is a wall 4 times this big.
• X = 100, K = 4
• This tyes into Proportional relationships.

Future

• This will be used for Architecture and, Partially, mechanics.

Useful websites

• here are some useful websites you can use.
• https://sites.google.com/site/cougarmathnerd/Home/write/scale-factor-websit...

Assesment Time

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