36 burgers
Since 1 pound can make 4 burgers
9 pounds can make 36 by multiplying 9 by 4
The point-slope form of a line:

We have the points (-9, -5) and (2, -4). Substitute:

The standard form of a line:

<em>multiply both sides by 11</em>

<em>subtract 9 from both sides</em>
<em>subtract 11y from both sides</em>


A perfect square trinomial is
(square of one term) + (square of another term) + (double the product of the two terms)