Vocab
What does slope mean?
rise/run
or change in y values divided by the change in x values
13x-3y=-15
y=13x/3+5
(14,-8);(-11,7) (simplify if possible)
-3/5
Slope =-1/2 y-int: 2
y=-x/2+2
through (4,5) slope: 1/2
y=x/2+3
What is the point that goes through the x axis called
x+3y=-1
y=-x/3-1/3
(-7,-17);(9,4)
21/16
Slope:4 y-int: -1
y=4x-1
through: (5,1) slope=2/5
y=2x/5-1
What is the point that goes through the y-axis called?
y-intercept
y=-7
Trick question y=-7
(12,1);(-6,3) (simplify if possible)
Slope: 2/7 y-int: -1/5
y=2x/7-1/5
through (-5,0) slope=3/5
y=3x/5+3
What is the point (0,0) called?
Origin
x+8y=64
y=-x/8+8
(-19,19);(-14,16) (simplify if possible)
-3/5
Slope: -4/9 y-int: 5
y=-4x/9+5
through (-2,0) slope=-1/2
y=-x/2-1
If a slope is x/0 what can we call it?
Undefined or a horizontal line
2x-y=-24
y=2x+24
(9,12);(-5,12)
0
Slope: 9 y-int: 7/13
y=9x+7/13
through (7,3) slope=-2/7
y=-2x/7+5