Graphing - The intro:
3x + 4y = 12
Graphing - Phase Two:
3x + 4y = 12
Finally! The algebra student’s best friend
Graphing with our new best friend:
1.
2.
3.
3x + 4y = 12
y= ‒2‒ 4x
2x ‒ 5y = 10
y = ‒x
x=3
y = ‒5
Graphing Inequalities:
1.
2.
3.
*
y > ‒2‒ 4x
2x ‒ 5y > 10
To find the equation of a line, you must have 2 things:
1.
2.
Find the equation of the line with slope ½ going thru (2, 3)
Find the equation of the line thru point (-1, -5) and (2,-2).
Practice
Graph the line
2x – y = 3
Find the equation of the line containing the points (0,2) (3, -1)