Objective:
to use the slope formula to find the slope of a line given 2 points.
to find the slope given a table or a graph.
4-1 B: Slope of a line
Slope formula given 2 points:
m=
y2 - y1
x2 - x1
1) Label each point (x1, y1) (x2, y2)
2) Substitute each value into the formula.
3) Simplify the numerator
4) Simplify the denominator
5) Simplify the slope (if possible)
Objective:
to use the slope formula to find the slope of a line given 2 points.
to find the slope given a table or a graph.
Examples: Find the slope of the line with the given coordinates.
y2 - y1
1) (0,-1) , (3,-2)
2) (2,5) , (0,2)
m= x -x
2
1
Objective:
to use the slope formula to find the slope of a line given 2 points.
to find the slope given a table or a graph.
3) (-3,-2) , (2,-2)
y2 - y1
m= x -x
2
1
4) (-3,2) and (-3,-1)
Objective:
to use the slope formula to find the slope of a line given 2 points.
to find the slope given a table or a graph.
Finding slope from a table
Pick 2 points. Then use the slope formula.
5)
6)
Objective:
to use the slope formula to find the slope of a line given 2 points.
to find the slope given a table or a graph.
Finding slope from a graph
Pick 2 points from the graph. Then use the slope formula.
7) The graph shows the number of parts assembled by a factory worker
as a function of time. Find her assembly speed in parts per hour.
8) The graph shows the distance traveled by a wakeboarder as a function
of time. Find the wakeboarder's speed in feet per second.