Open Up - Grade 7 - Mathematics - Unit 4 - Lesson 15

Water is running into a bathtub at a constant rate. After 2 minutes, the tub is filled with 2.5 gallons of water. Write two equations for this proportional relationship. Use w for the amount of water (gallons) and t for time (minutes). In each case, what does the constant of proportionality tell you about the situation?

Tags

7.RP.3

Noah picked 3 kg of cherries. Jada picked half as many cherries as Noah. How many total kg of cherries did Jada and Noah pick?

Tags

7.RP.3

The reading on a car’s speedometer has 1.6% maximum error. The speed limit on a road is 65 miles per hour.The speedometer reads 64 miles per hour. Is it possible that the car is going over the speed limit?

• Yes the Car is speeding.
• No the Car is following the law.

Tags

7.RP.3

The reading on a car’s speedometer has 1.6% maximum error. The speed limit on a road is 65 miles per hour.The speedometer reads 66 miles per hour. Is the car definitely going over the speed limit?

• Yes the Car is speeding.
• No the Car is following the law.

Tags

7.RP.3

Here is a shape with some measurements in cm. Complete the table showing the area of different scaled copies of the triangle. Is the relationship between the scale factor and the area of the scaled copy proportional?

• Yes, there is a Proportional Relationship
• No, there is not a Proportional Relationship

Tags

7.RP.3