This document provides a rubric for graphing linear systems. It evaluates labeling of axes, graphing lines with the correct slope and y-intercept or x-intercept, interpreting intersections to find the solution coordinate pair, and interpreting non-intersecting or identical lines. The highest level requires clear, neat labels and accurate graphing of lines to display the linear system and solution(s). Lower levels have incomplete or missing labels, slopes, intercepts, or conclusions.

1. •
Graphing : Linear Systems
• Teacher Name: Mrs. DiCosmo
•
•
• Student Name: ________________________________________
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CATEGORY
4
3
Labeling of X axis
The X axis has a
The X axis has a clear
clear, neat label and
label and plotted
plotted points
points
Labeling of Y axis
The Y axis has a
The Y axis has a clear
clear, neat label and
label and plotted
plotted points
points
Graphing first line
The coordinate
The coordinate
system has a
system has an
correctly identified
identified slope and
slope and y-int. or
y-int. or identified xcorrectly identified
int and y-int. Line is
x-int and y-int. Line
defined.
is clearly defined.
Graphing second line The coordinate
The coordinate
system has a
system has an
correctly identified
identified slope and
slope and y-int. or
y-int. or identified xcorrectly identified
int and y-int. Line is
x-int and y-int. Line
defined.
is clearly defined.
Interpreting the
Correctly
Approximated x and
graph if lines are
approximated x and
y values are found
intercepting
y values are found
and answer is
and answer is
presented in (x, y)
2
The X axis has a
label.
1
The X axis is not
labeled.
The Y axis has a
label.
The Y axis is not
labeled.
The coordinate
system has a slope
and y-int. or x-int
and y-int. Line is
defined.
The coordinate
system does not
have a slope and yint. or x-int and yint. Line is not
defined.
The coordinate
system has a slope
and y-int. or x-int
and y-int. Line is
defined.
The coordinate
system does not
have a slope and yint. or x-int and yint. Line is not
defined.
At least one, either x
or y values are
found and answer
may not be
Neither x or y
values are found
and answer is not
be presented in (x,

2. Interpreting the
graph if lines are not
intercepting
Interpreting the
graph if both lines
are the same
presented in (x, y)
form
Lines clearly marked
as parallel and
conclusion about
system not having
any solutions.
Lines clearly marked
as the same and
conclusion about
system having many
solutions.
Date Created: Nov 26, 2013 06:59 am (CST)
form
Lines marked as
parallel but no clear
conclusion about
system not having
any solutions.
Lines marked as the
same but no clear
conclusion about
system having many
solutions.
presented in (x, y)
form
Lines not marked as
parallel and no clear
conclusion about
system not having
any solutions.
Lines not marked as
the same and no
clear conclusion
about system
having many
solutions.
y) form
Lines not marked as
parallel and no
conclusion about
system not having
any solutions.
Lines not marked as
the same and no
conclusion about
system having many
solutions.