LINES IN THE COORDINATE PLANE

1
3-6

• LINES IN THE COORDINATE PLANE

2
SLOPE

• RISE OVER RUN

3
3 LINE EQUATIONS

• SLOPE-INTERCPT FORM y mx b
• STANDARD FORM Ax By C
• POINT-SLOPE FORM y y1 m( x x1)

4
y mx b

• m SLOPE
• b Y INTERCEPT WHERE THE
  LINE CROSSES THE Y AXIS.
• y x A POINT ON THE LINE

5
Ax By C

• A, B C WHOLE NUMBERS
• A CAN NOT BE NEGATIVE

6
y y1 m( x x1)

• USE WHEN GIVEN 1 POINT, (x1, y1) AND SLOPE
• SUBSTITUTE IN THE GIVEN VALUES THEN SIMPLY INTO
  SLOPE-INTERCPT FORM

7
HORIZONTAL VERTICAL LINES

• HORIZONTAL
• SLOPE 0
• Y SOME NUMBER

• VERTICAL
• SLOPE IS UNDEFINED
• X SOME NUMBER