2. Example #1: For her neighborhood barbecue, Mary bought 5 pounds of chicken for the cost of $10.95. Worried that she didn’t have enough food, she returned to the store and purchased an additional 3 pounds of chicken. How much did she pay for the extra 3 pounds of chicken? Write a verbal model of what you are comparing. Substitute in the values you are given. Use x to represent the quantity that you are looking for. x = Cost of 3 pounds of chicken Solve the proportion using cross products. Mary paid $6.57 for 3 pounds of chicken.

3. Example #2:Last month, Ernie received $542.75 in wages for 65 hours of work. He worked 72 hours this month. How much will his wages be this month? Ernie earned $601.20 for 72 hours of work this month. x = wages this month

4. Example #3 Mr. Wong bought a new car. He traveled 392 miles on 14 gallons of gas. At this gas mileage, how many gallons of gas will Mr. Wong need to travel 238 miles? Mr. Wong will need 8.5 gallons of gas to travel 238 miles. x = gallons needed for 238 miles

5. Example #4: Karen is in charge of the church’s pancake breakfast. Her recipe calls for 2.5 cups of flour for 20 pancakes. She predicts she will need to feed 85 people an average of 4 pancakes each. How much flour will she need? Karen needs 42.5 cups of flour. x = cups of flour needed for the breakfast

6. Example #5 The new exercise machine at the gym claims to burn 275 calories in 15 minutes. If Felix works out 3.5 hours over the first week, how many calories should he have burned? Felix burned 3850 calories in 3.5 hours. x = calories burned in 3.5 hours

7. Example #6 Eugene buys a car in Toronto, Canada for $8,200 in Canadian dollars, CAD. How much did Eugene spend in US dollars, USD? At the time he purchased his car, the conversion rate was 1 USD = 1.09 CAD. Eugene spent $6560 USD. x = amount spent in USD

8. BottleNumber of ounces in the bottle Cost of bottle Cost per ounce A30 oz.$2.79 B60 oz.$5.64 C120 oz.$10.92 Example #7 Mr. Baxter purchases bulk laundry soap. Complete the following chart to determine which bottle is the best buy. Bottle C is the best buy because it has the lowest cost per ounce. We are finding the unit rate for each bottle to compare the cost.