3 Qualitative Graphs Notes Math8 2015­2016.notebook
March 01, 2016
Unit 6 Lesson 3
Qualitative Graphs
Warm Up
Abe is downloading photos from his phone to his computer. The table
shows the percent of photos downloaded for several seconds.
time (sec) % downloaded
1) is the function
linear?
2) During which period
of time did the percent
downloaded change the
most?
3) Graph. Is it appropriate to connect
the points? When is it NOT
appropriate to connect points?
0
2
4
6
8
10
12
14
0
15
30
30
64
64
82
100
100
continuous
80
60
40
discrete
20
0
2 4 6 8 10 12 14 16
percent
downloaded
Qualitative graphs represent situations that may not
numerical values
have __________________________
OR graphs in
numerical values are not included.
which ______________________
you can see
relationship
time (sec)
axes are labeled
but no numerical
values are included
3 Qualitative Graphs Notes Math8 2015­2016.notebook
March 01, 2016
*KEY WORDS TO USE: no change, decreasing,
increasing, constant rate of change, initial value, turn off water,
turn on water, drain water
water level
Ex: This graph displays water level in a
bathtub. Describe the change in the water
level over time both mathematically and in
practical terms.
time
(click here v )
At time zero, the water level is zero
The water level increases at a constant rate.
Water is turned off and the level doesn't change as time increases.
When the water is drained, the water level decreases at a constant rate
until the water level is zero.
You try these...
temperature
a. describe the change in temperature over time
time of day
sales
b. Describe sales over time
time
3 Qualitative Graphs Notes Math8 2015­2016.notebook
March 01, 2016
distance from floor
A tennis ball is dropped onto the floor. On each successive
bounce, it rebounds to a height less than its previous bounce
height until it comes to rest on the floor. Sketch a qualitative
graph to represent the situation.
time
distance from the ground
Peter the panda is swinging on a swing.
Sketch a qualitative graph to represent
the situation.
time elapsed
3 Qualitative Graphs Notes Math8 2015­2016.notebook
March 01, 2016
Darielle is standing 5 ft from the front door of her house (front
door is located at 0 distance). She runs further away from the
house. Her Mom calls and she walks back to the front door.
Which graph below tells about Darielle’s moving in her yard?
A car is traveling at a constant speed. The car slows
down steadily to come to a rest at a stop light. Sketch
a qualitative graph to represent the situation.
3 Qualitative Graphs Notes Math8 2015­2016.notebook
March 01, 2016
CW/Homework~
Know the Situation WS (1-12)
Scatter Plots (1-12)
Linear Functions (1-12)