Unit 3
Unit 3
Linear Relationships
Link to Illustrative Matehmatics
Proprotional Relationships
Linear relationships that go through the Origin (0,0)
Slope
Also Known As:
- Rate Of Change
- Constant Of Proportionality
- Unit Rate
- Just call it SLOPE
Equation of a line in 2 forms
We did the equation of a line in *Slope Intercept form * Y=MX+B
We also did the equation of a line in Standard Form Ax+By=C
for more details see Equation of a Line
Special Lines
Horizontal Lines
Horizontal lines in the coordinate plane represent situations where the Y value doesn’t change at all while the X value changes. For example, the horizontal line that goes through the point (0,13) can be described in words as “for all points on the line, the Y value is always 13.” An equation that says the same thing is y=13.
The equation of this line is Y=5
Vertical Lines
Vertical lines represent situations where the X value doesn’t change at all while the Y value changes. The equation X=-4 describes a vertical line through the point (-4,0).
The equation of this line is X=8
