2. EQUATION OF A STRAIGHT LINE
• LINEAER EQUATION IS WRITTEN AS:
• ax + by + c =0
• Where a and b are not both equal to zero
• Some important data on line are points, slope and
intercepts
3. THE ANGLE OF INCLINATION
• Inclination of a line is the angle between the line and the
positive direction of x−axis. Value of this angle is between
0o and 180o. It is measured in anti-clockwise direction
from the positive direction of x−axis.
•
5. SLOPE
• tan θ = Δy/Δx
• The slope of a straight line between two points
says (x1,y1) and (x2,y2) can be easily determined
by finding the difference between the coordinates
of the points. The slope is usually represented by
the letter 'm'.
6. ACTIVITY
•I am a number you get when you
add the sides of a rectangle and a
square.
•
8. POSITIVE SLOPE
• A positive slope means that two variables are
positively related—that is, when x increases, so
does y, and when x decreases, y decreases also.
Graphically, a positive slope means that as a line
on the line graph moves from left to right, the line
rises.
9. NEGATIVE SLOPE
•A line with a negative slope is a line that
is negative vtrending downward from left
to right. In other words, the line's rise to
run ratio is a alue.
