1-5: Graphs in ScienceLine graphs are a powerful tool in science.

Anticipatory Set

A graph is a drawing that displays information in the form of a line or with different-sized bars. A newspaper

sometimes uses graphs to show temperatures over a period of time or rainfall through a week.

California StandardsScience Standard 8.9.d: Recognize

the slope of the linear graph as the constant in the relationship y=kx and apply this principle in interpreting graphs constructed from data.

Science Standard 8.9.g: Distinguish between linear and nonlinear relationships on a graph of data.

Inputgraph: a “picture” of your data.horizontal axis: (x-axis) graph line that runs

left to right.vertical axis: (y-axis) graph line that runs up

and down.origin: (0,0) the point where the two axes

crosscoordinate: a pair of numbers used to

determine the position of a point on a graph.

Inputdata point: the point showing the location of

an intersection.line of best fit: smooth line that reflects the

general pattern of a graph.linear graph: a line graph in which the data

points yield a straight line.slope: the steepness of a graphed line.nonlinear graph: a line graph in which the

data points do not fall along a straight line.

InputLine graphs are used to display data to show how one variable (the responding variable) changes in response to another variable (the manipulated variable).

Volume of Water (mL) Boiling Time

500 7 min 48 s (7.8 min)

1,000 16 min 37 s (16.6 min)

1,500 26 min 00 s (26.0 min)

2,000 33 min 44 s (33.7 min)Manipulated

Responding

InputSteps to Plotting a

Line Graph…1. Draw the axes2. Label the axes3. Create a scale4. Plot the data5. Draw a “line of

best fit”6. Add a title

InputA line of best fit emphasizes the overall trend shown by all the data taken as a whole.

Input & Modeling

The slope of a graph line tells you how much y changes for every change in x.

Points (20,10) and (50,25)Slope = 25 km – 10 km = 15 km = 0.5 km/min 50 min – 20 min 30 min

InputLine graphs are powerful tools in science because they allow you to identify trends and make predictions.

What is a pair of numbers used to determine the position of a point on a graph? coordinate

What is a graph in which the data points do not fall along a straight line?A nonlinear graph

Check forUnderstanding

Answer #2 & 5Guided Practice

Independent PracticeFinish the worksheet.

HOMEWORK EXTENSION Write a detailed SUMMARY of the section and

complete the UNANSWERED QUESTIONS section of your notes.

Choose two of the remaining Depth & Complexity ICONS in your notes and explain how they relate to this section.