4.4 The Slope of a Line
rise
change in y
y2 - y1
m= run = change in x = x2 - x1
Slopes can be positive, negative, zero or
undefined
Find the slope of the line with the given points
(-2,2) and (3,4)
(-1,2) and (3,2)
(2,1) and (2,4)
(3,-3) and (0,0)
Given the slope, find the y-coordinate
Line passing through the points (-2,1) and
2
(4,y) with m=3
Are these slopes positive, negative,
undefined, or zero?
Find the rate of change between the points. Give the
units of measure for the rate
1. (2, 2) and (9, 23); x in minutes, y in inches
2. (3, 5) and (11, 69); x in years, y in dollars.
3. (53, 44) and (32, 14); x in seconds, y in liters
Label the two points and use the points to find
the slope of the line.