Today’s Objective:
Learn to identify, compare, and
describe function: proportional and
non-proportional.
Relations
Functions
Linear
Proportional
Nonproportional
NonFunction
Nonlinear
Vocabulary:
Proportional Function:
A function where two quantities vary directly
with each other multiplicatively with a constant
and the initial value is 0.
Non-proportional Function
A function where two quantities vary directly
with each other multiplicatively with a constant
and the initial value is something other than 0.
Initial Value:
The starting value of a function.
Proportional
Non-proportional
Proportional
Non-proportional
X
Y
X
Y
0
0
0
8
1
8
1
14
2
16
2
20
3
24
3
26
4
32
4
32
5
40
5
38
Proportional
Non-proportional
C.R.O.C. or Slope
y = 8x
OR
y = 8x + 0
y = 6x + 8
Initial Value
Find the CROC and Initial Value for each set of data. Write an equation
for each. Then determine if each is a proportional or non-proportional
function.