Identify Direct and Inverse Proportions

Jeremy uses 400 g of flour to make 8 muffins. How much flour would he need to make 30 muffins? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

It takes 4 men 6 hours to repair a road. How long will it take 8 men to do the job if they work at the same rate? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

A syrup is made by dissolving 2 cups of sugar in 2/3 cups of boiling water. How many cups of sugar should be used for 2 cups of boiling water? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

A recipe uses 5 cups of flour for every 2 cups of sugar. If I want to make a recipe using 8 cups of flour, how much sugar do I use? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

6 builders can build 10 houses in 30 months. How long would it take 18 builders to build the same number of houses? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

A school buys 8 gallons of juice for 100 kids. how many gallons do they need for 175 kids? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion

ALast month, it took 3 gardeners 12 hours to fix up the gardens in the city’s main square. This month, the city has a bigger budget and can hire 6 gardeners. Knowing that it took 12 hours to finish the job for 3 gardeners, how much time will it take for 6 gardeners to fix up the gardens? Is it direct or inverse proportion problem?

• Direct proportion

• Indirect proportion