Linear Flyswatter
First player to slap the correct answer
to the problem on the top of the slide
gets a point for his or her team.
Identify the
Slope-intercept Equation
Ax  By  C
y  mx  b
y2  y1  mx2  x1 
y  ax  bx  c
2
Identify the Equation for
Standard Linear Form
Ax  By  C
y  mx  b
y2  y1  mx2  x1 
y  ax  bx  c
2
Which Equation to find the
Slope from Two Points?
Ax  By  C
y  mx  b
y  ax  bx  c
2
y2  y1
m
x2  x1
Find Slope of Line:
2
2x  5 y  5
2
5
1
2
5
Slope is NOT
rise
run
x2  x1
y 2  y1
y
x
y 2  y1
x2  x1
A horizontal line has
Positive slope
Negative slope
Zero slope
Undefined slope
An increasing function has
Positive slope
Negative slope
Zero slope
Undefined slope
A vertical line has
Positive slope
Negative slope
Zero slope
Undefined slope
Which graph has negative slope
and positive y intercept?
What are the general coordinates
for the x-intercept?
(0, 0)
(0, k)
(k, 0)
Undefined
What is the slope of a line parallel
3
to y  x  2 ?
5
5
3
3
5
5
3
3
5
What are the general coordinates
for the y-intercept?
(0, 0)
(k, 0)
(0, k)
Undefined
Find x-intercept:
20
y  4 x  20
5
5
 20
2
5
What is the slope of a line
3
perpendicular to y  5 x  2 ?
5
3
3
5
5
3
3
5