Topic 1:Graphing Notes

How does graphing help you classify and discover relationships?

What are the different types of graphs?

The different types of graphs are pie charts, bar graphs and line graphs.

Why are graphs used?

Graphs are used to show data in a clearer way.

Allows for comparisons.

What are the parts of a graph?

Parts of the graph are seen in the picture below:

1) Title = informs you what you are looking at

2) Key = informs you what the graph provides

3) Axes = x-axis and y-axis (labeled)

4) Data = information collected during experiment

What is a variable?

• Any factor that can change.

• Variable = vary

• There are different types we focus on: independent and dependent variables

What is the independent variable?

• The factor that scientists change during the experiment. Independent variables answer the question "What do I change?".

• Time is most likely the independent variable

• Always on x-axis

What is the dependant variable?

• The variable that changes as a result of changes in the independent variable. Dependent variables answer the question "What do I observe?".

• Always on the y-axis

• Dependent variable

is Cal’s weight

What is a control?

• The part of the experiment that stays the same (not being tested)

• It is used for comparisons

What is slope and what information can it provide you with?

• The slope is the steepness in the line.

• In math it is known as

or the change in y divided by the change in x.

• The greater the slope, the greater the rate of change

What is a direct relationship?

• A direct relationship is when one value goes up, so does the other.

What is an example of a direct relationship?

• My bank account will increase, if the amount I add increases

• If the temperature outside goes up, the pool water will go up.

• If the amount of food I eat increases, my weight will increase.

What is a inverse or indirect relationship?

• As one value increases, the other decreases.

What is an example of an inverse relationship?

• If I talk less, I will learn more

• If my spending increases, the amount of money I have decreases.

• If the amount of students who eat hot lunch increases, there will be less leftovers.

What is a cyclic change graph?

• A graph that shows a repeating pattern

• The pattern allows for predictions to be made

What is an example of a cyclic change?

• School periods of the day• Your schedule• The days of the week• Most of TV programs• Seasons• Tides• Eclipses• Moon Phases