Presentation on theme: "Graphing Lines How To Find THE SLOPE of a Line Given Two Points How To Find THE SLOPE of a Line Given Two Points."— Presentation transcript:
How To Find THE SLOPE of a Line Given Two Points How To Find THE SLOPE of a Line Given Two Points
Slope of a Line x y x1x1 x2x2 y2y2 y1y1
Definition of Slope The slope of the line is it’s measure of steepness. It measures the rate of change of the line. In all lines the slope is constant, it doesn’t change no matter where you are at on the line.
Find the Slope of the line containing the points
Bicycles In groups, generate the line that relates the number of wheels to the number of bicycles. Represent it Graphically. What does the slope of this line represent?
Graph of a Line xy -5 0-3 1 21 33
Intercepts Where the graph crosses the x-axis is the x-intercept. It has coordinates (a,0). Where the graph crosses the y-axis is the y-intercept. It has coordinates (0,b).
y x x-intercept y-intercept (a,0) (0,b) The x and y intercepts of a line
Example Find the x and y intercepts of the line given by:
Slope Intercept Form x y Any stinking point on the line y-intercept
Determine the slope and y-intercept of the following
Point Slope Form x y Any stinking point on the line Any stinking fixed point on the line
Find the Equation of the Line Through the Points
Line Formulas Slope Formula Slope Intercept Form Point Slope Form