Download An Algebra I Lesson on Slope

• Do symmetry tests examples
• Show how to show work
1.3 Review of linear equations
If Slope is the steepness of a line, how
can we calculate this “steepness”
Slope is equivalent to rise over run
Slope =
rise
run
=
y 2  y1
x2  x1
rise is vertical change (y’s)
run is horizontal change (x’s)
The Huashan
Trail in China
Other considerations
How to remember – Mr. Slope
Man!
Why m for slope?
• Some say from the french word “montant”
meaning rising
• However, in France they use s from the
English word slope.
• So yes, math books around the world are
working hard trying to confuse you.
Slope Intercept
y  mx  b
Point Slope
y  y1  m( x  x1 )
Ex
• Find the equation of a line that has a slope
of 4 and passes through the point (-2, -3)
Same
• Parallel lines have the ………..Slope
Negative
• Slopes of perpendicular lines are ………
Reciprocals
………….
of each other
H Dub
• 1.3 Page 35 #39-75EOO, 97, 101-104