Line graphs, Line graphs, slope, and slope, and

interpreting interpreting line graphsline graphs

Charalee PeraCharalee PeraIncorporating Technology into the Incorporating Technology into the

ClassroomClassroomWednesday September 29Wednesday September 29 20102010

Standards

9d. Students will 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

9g. Students will distinguish between linear and nonlinear relationships on a graph of data

Warm Up WED. 8-18-10•Take out BW5c•Use the data below to make a line graph

Volume of Water (mL)

Freeze time (min)

100 5200 12300 17400 22

How to draw a line graph

How to draw a line graph

(Y axis)

(X axis)

How to draw a line graph

Manipulated or Independent Variable

Responding or Dependent Variable

How to draw a line graph•Equally spaced intervals

•Covers the range of data you have

•Should begin at zero when possible

How to draw a line graph

Use the coordinates

from your data to plot a data point on the

graph

How to draw a line graph

•A smooth line that reflects the general pattern of the graph

•As close to each point as possible

How to draw a line graph

Identify the

variables and their

relationship on the graph

What is the formula used to calculate

slope?

Sloperise

run or

y2 y1

x2 x1

0 1 2 3 4 5 6 7 8 9 10

1

1098765432

MASS(g)

VOLUME (cm3 or mL)

X

Y The Density Lab

M V D

8.5 6 1.43

6.5 4 1.63

4 3 1.33

DATA TABLE

*

*Y2

y1 x2

x1

Slope7.3 3

5 2.1

4.3

2.91.4 gmL

RISE

RUN

References Pearson Prentice Hall,

Focus of Physical Science, Textbook

ALL other pictures were created by myself using power point tools