Variables and Patterns Variables, Tables, and Coordinate Graphs Investigation 1

1.1 Preparing for a Bicycle Tour Interpreting Tables Table – A list of values for two or more variables that shows the relationship between them. Jumping Jack Experiment Time (secs) 10 20 30 Total # of Jumping Jacks 12 11 Tables are used to represent data made from: observations experiments a series of arithmetic operations

1.2 Making Graphs KeY VoCaBuLaRy Variable A quantity that can change. Coordinate Graph A graphical representation of pairs of related numerical values. Independent Variable Its value determines the value of the other variable. The value can stand ALONE and it goes on the x-axis. (ex. Time) Dependent Variable Its value depends upon or is determined by the other variable and it goes on the y-axis. (ex. Cost) Coordinate Pair An order pair of numbers. (x,y). EX: (0, 10) Scale A way to label the axes on a coordinate graph.

Steps to Make a Graph 1) Identify the variables 1.2 Making Graphs Steps to Make a Graph Y 1) Identify the variables 2) Select an axis to represent each variable 3) Select a scale 4) Plot the data points 5) Title your graph TITLE Dependent X Independent Create Scales Make sure to create and equidistant pattern. Find the lowest number and the highest number in the data set then choose a logical interval starting at zero. (go by 1’s, 2’s, 3’s, 5’s, 10’s, etc.)

To interpret plotted lines compare the x axis to the y axis. 1.3 Atlantic City to Lewis Interpreting Graphs To interpret plotted lines compare the x axis to the y axis. Distance Distance Time Time In the beginning as time increased, the distance increased. Then half way the time was still increasing, but the distance decreased. As time increased the distance also increased.

Reading Data from Graphs Connect the data points when: It shows changes over time. Benefit of connected data points? See patterns of change Predict and make estimates about other data.

1.5 – Day 3 Chincoteague Island to Norfolk Steps to make a Chart/Graph Finding Averages Steps to make a Chart/Graph from a Narrative. Find the start time. Find the end time. Look for other key events. Fill in what you know and create the rest of the information.