how to draw scatter graph - science

What is the very first step before you put any numbers or dots on your graph?

• Draw a nice picture.

• Think of a fun name.

• Write labels on your 'X' and 'Y' lines.

• Find the middle spot.

Your 'Breathing Rate' numbers go from 25 to 55. If your graph has 8 big squares across, how many breaths should each big square stand for?

• 1 breath

• 2 breaths

• 5 breaths

• 10 breaths

Your 'Pulse Rate' numbers go from 85 to 130. If your graph has 9 big squares going up, how many heartbeats should each big square stand for?

• 2 heartbeats

• 5 heartbeats

• 10 heartbeats

• 1 heartbeat

When you put a dot for a person who breathed 40 times and had 105 heartbeats, which way do you move first from the start of the graph?

• Go up the side to 105.

• Go right along the bottom to 40.

• Go down the side to 40.

• Go left along the bottom to 105.

After you find the right spot for a person's dot, what do you put on the graph paper?

• A small circle or 'X'.

• A big shaded area.

• A long straight line.

• Nothing, just remember where it is.

What happens if the numbers on your 'X' line are too far apart (like counting by 1s for numbers 10 to 100)?

• Your graph will look very neat.

• You won't have enough space for all your dots.

• Your dots will be too close.

• You will finish the graph very fast.

What happens if the numbers on your 'Y' line are too close together (like counting by 20s for numbers 90 to 110)?

• Your graph will be too tall.

• Your dots will be too far apart.

• It will be hard to see small differences in the numbers.

• The graph will be perfect.

True or False: After you put all your dots on a scatter graph, you should connect them with straight lines.

• True

• False

• Only if they form a perfect line.

• Only for the first three dots.

If someone's Breathing Rate is 26, and your 'X' line starts at 20 and counts by 5s (20, 25, 30...), where would you find 26?

• A little before 25.

• Exactly on 25.

• A little after 25.

• Exactly on 30.

If someone's Pulse Rate is 100, and your 'Y' line starts at 80 and counts by 5s (80, 85, 90...), which number on your line is 100 near?

• Near 85.

• Near 90.

• Near 100.

• Near 80.