Proportion and Non-Proportion SituationsProjector Resources Proportion and Non-Proportion Situations Projector Resources.

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Presentation transcript:

Proportion and Non-Proportion SituationsProjector Resources Proportion and Non-Proportion Situations Projector Resources

Proportion and Non-Proportion SituationsProjector Resources Buying Cheese 10 ounces of cheese costs $2.40 Ross wants to buy ……… ounces of cheese. Ross will have to pay $ P-1

Proportion and Non-Proportion SituationsProjector Resources Properties of Direct Proportion One quantity is a multiple of the other. If the first quantity is zero, the second quantity is zero. If you double one quantity, the other also doubles. The graph of the relationship, is a straight line through the origin. P-2

Proportion and Non-Proportion SituationsProjector Resources Working Together Choose one of the cards to work on together. 1. Choose some easy numbers to fill in the blanks. Answer the question you have written. Write all your reasoning on the card. 2.Now choose harder numbers to fill in the blanks. Answer your new question together. Write all your reasoning on the card. 3.Decide whether the quantities vary in direct proportion. Write your answer and your reasoning on the card. When you have finished one card, choose another. P-3

Proportion and Non-Proportion SituationsProjector Resources Analyzing Each Other’s Work Carefully read each solution in turn. Is there anything you don’t understand? Do you notice any errors? Compare the work to your own solution to the question. Have you used the same methods? Do you have the same numerical answers? Do you agree about which question involves direct proportion? P-4

Proportion and Non-Proportion SituationsProjector Resources Driving P-5 If I drive at.… miles per hour, my journey will take …. hours. How long will my journey take if I drive at …. miles per hour?

Proportion and Non-Proportion SituationsProjector Resources Internet P-6 An internet service provides.... GB (gigabites) free each month. Extra GB used is charged at $..... per GB. I used..... GB last month. How much did this cost?

Proportion and Non-Proportion SituationsProjector Resources Cell Phone P-7 A cell phone company charges $... per month plus $.... per call minute. I used.… call minutes last month. How much did this cost?

Proportion and Non-Proportion SituationsProjector Resources Map P-8 A road.… inches long on a map is.… miles long in real life. A river is.… inches long on the map. How long is the river in real life?

Proportion and Non-Proportion SituationsProjector Resources Toast P-9

Proportion and Non-Proportion SituationsProjector Resources Smoothie P-10 To make three strawberry smoothies, you need:.… cups of apple juice …. bananas.… cups of strawberries How many bananas are needed for …. smoothies?

Proportion and Non-Proportion SituationsProjector Resources Triangles P-11

Proportion and Non-Proportion SituationsProjector Resources Line P-12

Proportion and Non-Proportion SituationsProjector Resources Proportion or not? P-13 What situations would give graphs like these? Which are proportional situations? OOO