Exercise 3 Page 312

We have been given a sentence and we need to translate it into an equation. The output is twice the input. Every equation has an equals sign and values or expressions on either side of it. Key phrases, such as is, is equal to, and equals tell us about the placement of the equals sign. The output is twice the input. ⇕ The output = twice the input. On the left-hand side we have a key word, output. This word represents the variable y. The output → y On the right-hand side, the key words are twice and input. Twice indicates a multiplication by 2 and input represents the variable x. twice the input 2 x Putting these sides together, we have a complete equation. y = 2 x