QTD: "b" investigation

a

g

4

1

2

5

8

6

7

9

0

3

a

g

1

2

9

6

7

5

4

0

8

3

• 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

-1

2.25

1.25

-1.25

1

0.25

-0.25

0

-2.25

g

h

i

f

0

1.25

1

2.25

-1

0.25

-1.25

-2.25

-0.25