# How do you write the word phrases into algebraic expressions: The number of students interested is twice last year’s group?

Sep 14, 2017

Assign the groups a variable, then compare to get $y = 2 x$

#### Explanation:

Assign each group a variable:

Last year's group: $x$
Students interested this year: $y$

We're comparing a set number, $y$, to whatever $t w i c e$ of last year's group is.

We'd want to multiply last year, $x$, by $2$, to get $2 x$.

Because we know these numbers are equal, we can then set them equal to each other.

$y = 2 x$