Graphing linear equations By Robert O Mills Jr
- Slides: 21
Graphing linear equations By Robert O. Mills Jr. Hermitage High School Henrico County Public Schools
Part Three Graphing
After you have discovered a relation of at least 3 ordered pairs you may now graph the linear equation.
Given the solution : y=x+4
Create a t-table with the domain (x values) as {-1, 0, 1}. y x -1 3 0 4 1 5
Place the points on a graph. x y -1 3 0 4 1 5
Add additional points to the graph.
Draw a line connecting all the points.
New solution: y=4 -x Plot table and graph points. x y -1 5 0 4 1 3
Add additional points to the graph.
Draw a line connecting all the points.
New solution: y=x-4 Plot table and graph points. x y -1 -5 0 -4 1 -3
Add additional points to the graph.
Draw a line connecting all the points.
New solution: Plot table and graph points. x y -1 2. 5 0 2 1 1. 5
Add additional points to the graph.
Draw a line connecting all the points.
New solution: Plot table and graph points. x y -1 -3 0 -2 1 -2
Add additional points to the graph.
Draw a line connecting all the points.
Please note the following: • All linear equations graph to a line. • When +x is in the final solution the line increases in value (goes up). • When -x is in the final solution the line decreases in value (goes down). • The value of y when the value of x=0 is the point where the line crosses the y axis. (y intercept)
