The document discusses how to graph linear equations. It states that the graph of an equation is the set of all solutions, where a solution is an ordered pair that makes the equation true. It provides steps for graphing an equation, which include rewriting the equation to solve for y, making an input/output table using values for x, plotting the ordered pairs, and connecting the points with a straight line. It also discusses that the graph of y=b is a horizontal line and the graph of x=a is a vertical line. Finally, it notes that intercepts are found by plugging values into the equation - the x-intercept uses y=0 and the y-intercept uses x=0.

1. Graphing Linear Equations
4.2
p. 210

2. A solution to an equation is an ordered
pair (x, y) that makes the equation true.

3. A solution to an equation is an ordered
pair (x, y) that makes the equation true.
The graph of an equation is the set of
all the solutions.

4. A solution to an equation is an ordered
pair (x, y) that makes the equation true.
The graph of an equation is the set of
all the solutions.
The graph of a linear equation is a line.

6. Graphing an Equation
1. Rewrite the equation by solving for y.

7. Graphing an Equation
1. Rewrite the equation by solving for y.
2. Choose a few values for x and make
an input/output table.

8. Graphing an Equation
1. Rewrite the equation by solving for y.
2. Choose a few values for x and make
an input/output table.
3. Plot each ordered pair.

9. Graphing an Equation
1. Rewrite the equation by solving for y.
2. Choose a few values for x and make
an input/output table.
3. Plot each ordered pair.
4. Connect the points with a straight line.

10. Horizontal and Vertical lines
 The graph of y = b
is a horizontal line.
 “b” means any
number.
y = 2

11. Horizontal and Vertical lines
 The graph of x = a is
a vertical line.
 “a” means any
number.
x = - 3

12. Horizontal and Vertical lines
 What is the “x” value
for any point on the
line x = -3? x = - 3

13. Intercepts
4.3

14. Intercepts
 The x-intercept is
the point where a
graph crosses the
x-axis.

15. Intercepts
 The x-intercept is
the point where a
graph crosses the
x-axis.
 The y-intercept is
the point where a
graph crosses the
y-axis.

16. Finding Intercepts
To find the x-intercept of a graph, plug
in y=0 and solve for x.

17. Finding Intercepts
To find the x-intercept of a graph, plug
in y=0 and solve for x.
To find the y-intercept of a graph, plug
in x=0 and solve for y.