Digits, Grade 8, Volume 1, Homework Helper

3-2: TEKS Practice

• 1. The value of y is one more than x.

• a. Represent this relationship by completing the table.

• b. Represent the relationship using an equation. Simplify your answer. Write an expression using x as the variable.

• c. Draw a graph to represent the relationship.

• 2. You can make 3 gal of liquid fertilizer by mixing 11 tsp of powdered fertilizer with water.

• a. Represent the relationship between the teaspoons of powder used and the gallons of fertilizer by completing the table.

• b. Represent the relationship using an equation. Simplify your answer. Write an expression using x as the variable.

• c. Draw a graph to represent the relationship.

• 3. Estimation A train leaves the station at time x = 0. Traveling at a constant speed, the train travels 218 km in 1.6 h.

• a. Round to the nearest 10 km and the nearest whole hour.

• b. Represent the relationship using a table. For 2, 3, and 4 hours, give values for distance traveled and the corresponding ordered pair.

• c. Represent the relationship using an equation. Write an expression using x as the variable.

• d. Graph the relationship.

• 4. Estimation While exploring a planet, a robot descends at a speed of 157 feet every 1.9 hours from a hill peak 1,360 feet above sea level.

• a. Estimate the robot's rate of descent by rounding to the nearest 10 feet and the nearest whole hour.

• b. Represent the robot's elevation, y, after x hours by completing the table.

• c. Represent the relationship using an equation. Simplify your answer. Write an expression using x as the variable.

• d. Draw a graph to represent the relationship.

• e. How many hours will it take the robot to reach the base of the hill?

• 5. Mental Math Make a table of values for the function y equals , 2 fifths , x plus 1 . Complete the table.

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