Example 11.16 from Prealgebra, 11.2 Graphing Linear Equations

Graphing Linear Equations: example 11.16

Graph the equation $0$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution
Find three points that are solutions to the equation. It’s easier to choose values for $x,$ and solve for $y .$ Do you see why?

List the points in a table.

$y = −3 x$

$x$ $y$ $(x, y)$

$0$ $0$ $(0, 0)$

$1$ $3$ $(1, −3)$

$−2$ $6$ $(−2, 6)$

Plot the points, check that they line up, and draw the line as shown.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Graph the equation by plotting points: $y = −4 x .$

How did it go?