How to Read, Develop, and Interpret GRAPHS! OBSERVATIONS: often are recorded in a data table. We INTERPRET our data table by making INFERENCES and PREDICTIONS One way to interpret is to ANALYZE data with GRAPHS #2

What is the relationship between Frog and Years for the following example: GRAPH IT YEAR ___# FROGS

ANALYZE your DATA Identify your problem: What is the relationship between the years and the number of frogs

Step One: Draw your Axis Y-axis X-axis

Step Two: Label Your X Axis: Y-axis X-axis Years

Step Two: Now Label Your Y Axis: Y-axis X-axis YEARS FROGS Was there enough room to label your y axis completely for this problem?

Step Two: Now Label Your Y Axis: Y-axis X-axis So, we have to change the SCALE of our Y-axis YEARS FROGS

Step Three: Now Plot Your Points Y-axis X-axis Years FROGS

Step Four: Now Draw Your LINE Y-axis X-axis Years FROGS

Step Five: Title? Y-axis X-axis Years FROGS

Step Five: Years vs. Frogs Y-axis X-axis Years FROGS

Y-axis X-axis Years FROGS What are the characteristics of the Red Point?

Y-axis X-axis Years FROGS What is the x coordinate and the y coordinate of the red star? (1991, 650)

Y-axis X-axis Years FROGS What is the x coordinate and the y coordinate of the green dot

Y-axis X-axis Years FROGS What are the characteristics of the Green Star? (x=1997, y=1500 Frogs)

Y-axis X-axis Years FROGS What would you estimate the frog population to be in 2000?

Y-axis X-axis Years FROGS What would be the x and y coordinates for your prediction of the frog population in 2000? (Jan 2000, 2100 frogs)

Y-axis X-axis Years FROGS This is called an EXTRAPOLATION

Y-axis X-axis Years FROGS This is called an INTERPOLATION

Internet Questions: Line Graph #2