Systems of
Linear Equations
Recalling Prior
Knowledge
Recall Prior Knowledge
•Graphing linear
equations using a
table of values
(function table).
Recall Prior Knowledge
• To graph a linear equation, you
can first construct a table of x and
y values.
• For example, you substitute x = 0
in the equation y = 2x + 1 to get
the corresponding value of y.
Recall Prior Knowledge
x
0
1
2
3
y = 2x + 1
1
3
5
7
Recall Prior Knowledge
• From the table of values,
you plot the pairs of values
on a coordinate grid. Then
join the points using a
straight line to graph the
linear equation.
Recall Prior Knowledge
Quick Check
• Copy and complete the
table of values for the
linear equation. Then
draw its graph on a
coordinate grid.
Quick Check
x
0
1
2
3
y = 5x
?
?
?
?
Quick Check
Recall Prior Knowledge
Graphing linear
equations using
slopes and yintercepts.
Recall Prior Knowledge
• You can also graph linear
equations by recognizing that
linear equations have the form y =
mx + b, where m is the slope and
b is the y-intercept.
• For example, for y = 2x + 1, the
graph has slope 2 and intersects
the y-axis at 1.
Recall Prior Knowledge
Quick Check
1.y = 5x
2.y = 2x + 2
3.2y = x – 2
Quick Check
Assignment: Assessing Your
Prior Knowledge
You are assigned problems 1 – 19
on page 367 in the red algebra I
book. Remember, you can use
your notes from previous units as
well as the red algebra I book if
you need help correctly solving
the problems.