Writing and Graphing Equations in Two Variables

Question 1 • TOL-202627-S1-MTH-Algebra 2A - Parker, Carla

Which description is represented by a discrete graph?

Answer

Kiley bought a platter for $19 and several matching bowls that were $8 each. What is the total cost before tax?

The temperature at 9 a.m. was 83° F and is heating up at an average rate of 6°F per hour. What is the temperature x hours later?

Juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. What is the total amount of calories he consumed?

A bottle contained 2,000 mL of liquid and is being poured out at an average rate of 300 mL per second. How much liquid is left in the bottle after x seconds?

Explanation

A discrete graph has separate points because its input values are countable whole numbers. The number of matching bowls Kiley buys must be a whole number, so the total cost is $19 plus $8 for each whole bowl. In the other descriptions, time or the amount of liquid can vary continuously, so their graphs are continuous.

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