Proportion and inverse proportion, F 1 2 – Casio fx-570MS User Manual
Page 6
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– 3 –
Proportion and Inverse Proportion
For
y
= 12/
x
, calculate the values of
y
for
x
= 1, 2,
3, 4, 5, 6, to determine how the value of
y
changes
in proportion to a gradual increase in the value of
x
.
Next, calculate the values of
y
for
x
= –1, –2, –3,
–4, –5, –6, to determine how the value of
y
changes in proportion to a gradual decrease in
the value of
x
.
1
.
Enter the COMP Mode.
F 1
2
.
Determine the value of
y
when
x
= 1.
1
a
-
12
=
Result: 12
3
.
Determine the value of
y
when
x
= 2.
2
a
-
12
=
Result: 6
4
.
Likewise, determine the values of
y
for
x
= 3, 4, 5, 6.
5
.
Press the
[
key five times to display the value of
y
= 12 when
x
= 1.
Example
Example
Operation
y
x
–5
–5
5
5
–10
–10
10
10
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