Linear Equation
Vertical Line
A line on the coordinate plane where all points on the line have the same x-coordinate. A vertical line has no slope. Or put another way, for a vertical line the slope is undefined. x=a
Horizontal Line
A straight line on the coordinate plane where all points on the line have the same y-coordinate. A horizontal line has a slope of zero. As you move to the right along the line, it does not rise or fall at all. and the slope is zero. y=b
Slope
A surface of which one end or side is at a higher level than another. a rising or falling surface
Linear Equations
An Equation between two variables that gives a straight line when plotted on the graph.
Negative Slope
If a line has a positive slope (i.e. m > 0 ), then y always increases when x increases and y always decreases when x decreases. Thus, the graph of the line starts at the bottom left and goes towards the top right.
Positive slope
If a line has a positive slope (i.e. m > 0 ), then y always increases when x increases and y always decreases when x decreases. Thus, the graph of the line starts at the bottom left and goes towards the top right.
Y-Intercept
Where a straight line crosses the Y axis of a graph.
Y=mx+b
y = how far up x = how far along m = Slope or Gradient (how steep the line is) b = the Y Intercept (where the line crosses the Y axis)