Graph x+y=3 8x+y=-4

$x + y = 3$ $8 x + y = - 4$

Graph $x + y = 3$ .

Subtract $x$ from both sides of the equation.

$y = 3 - x$

Rewrite in slope-intercept form.

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Reorder $3$ and $- x$ .

$y = - x + 3$

Use the slope-intercept form to find the slope and y-intercept.

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m = - 1$

$b = 3$

The slope of the line is the value of $m$ , and the y-intercept is the value of $b$ .

Slope: $- 1$

y-intercept: $(0, 3)$

Slope: $- 1$

y-intercept: $(0, 3)$

Any line can be graphed using two points. Select two $x$ values, and plug them into the equation to find the corresponding $y$ values.

Reorder $3$ and $- x$ .

$y = - x + 3$

Create a table of the $x$ and $y$ values.

$\begin{array}{c} x & y \\ 0 & 3 \\ 1 & 2 \end{array}$

Graph the line using the slope and the y-intercept, or the points.

Slope: $- 1$

y-intercept: $(0, 3)$

$\begin{array}{c} x & y \\ 0 & 3 \\ 1 & 2 \end{array}$

Slope: $- 1$

y-intercept: $(0, 3)$

$\begin{array}{c} x & y \\ 0 & 3 \\ 1 & 2 \end{array}$

Graph $8 x + y = - 4$ .

Subtract $8 x$ from both sides of the equation.

$y = - 4 - 8 x$

Rewrite in slope-intercept form.

The slope-intercept form is $y = m x + b$ , where $m$ is the slope and $b$ is the y-intercept.

$y = m x + b$

Reorder $- 4$ and $- 8 x$ .

$y = - 8 x - 4$

Use the slope-intercept form to find the slope and y-intercept.

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m = - 8$

$b = - 4$

The slope of the line is the value of $m$ , and the y-intercept is the value of $b$ .

Slope: $- 8$

y-intercept: $(0, - 4)$

Slope: $- 8$

y-intercept: $(0, - 4)$

Any line can be graphed using two points. Select two $x$ values, and plug them into the equation to find the corresponding $y$ values.

Reorder $- 4$ and $- 8 x$ .

$y = - 8 x - 4$

Create a table of the $x$ and $y$ values.

$\begin{array}{c} x & y \\ 0 & - 4 \\ 1 & - 12 \end{array}$

Graph the line using the slope and the y-intercept, or the points.

Slope: $- 8$

y-intercept: $(0, - 4)$

$\begin{array}{c} x & y \\ 0 & - 4 \\ 1 & - 12 \end{array}$

Slope: $- 8$

y-intercept: $(0, - 4)$

$\begin{array}{c} x & y \\ 0 & - 4 \\ 1 & - 12 \end{array}$

Plot each graph on the same coordinate system.

$x + y = 3$

$8 x + y = - 4$

Graph x+y=3 8x+y=-4

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