QTD: "b" investigation

a

g

4

2

6

1

5

9

8

7

0

3

a

g

4

2

3

5

7

9

6

1

0

8

• 0
• 9
• 2
• -2

• 0
• 9
• 2
• -2
• minimum
• maximum

• upwards

• downwards

• upwards

• downwards

• narrower
• 2.25
• wider
• 1.5
• 9
• 3

• greater than (>)

• less than (<)

g

h

i

f

-0.25

1.25

-1.25

1

-1

0.25

0

-2.25

2.25

g

h

i

f

0.25

-1.25

1

-0.25

0

-2.25

2.25

1.25

-1