Grade 7 · Unit 1 · Lesson 5 · part 1 of 5
The Words We Use
The vocabulary for this lesson, in one place.
Words we use
| Word | Plain English | What you do |
|---|---|---|
| Equation | A math sentence with an equals sign. | Read y = rx as output equals unit rate times input. |
| Variable | A letter that stands for an amount that can change. | Pick letters that match the story: c for cost, g for gallons. |
| y = rx | Output equals unit rate times input. | Multiply to go forward; divide by r to go back. |
| r | The unit rate, the number that never changes. | Find it from a table, a graph, words, or the number next to x. |