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Monday
August 24, 2009
Essential Question
How are relationships between components on a
scatter-plot graph determined?
What is a “line of best fit” or a “trend line”?
SC-H-MF-U-2
Students will understand that the usefulness of a model can be tested
by comparing its predictions to actual observations in the real world.
But a close match does not necessarily mean that the model is the
only “true” model or the only one that would work.
Homework
1. Vocabulary List A is DUE
2.
Writing Assignment: Tomatoes is
DUE
3.
Vocabulary List B will be due on
Monday, 31 August.
Tomorrow there will also be a short quiz.
Vocabulary Quiz A
1.
In space for name, be sure and put both
your first and last names
2.
Record your answer in the space
provided left of the number
3.
Turn your paper face down when
finished
Review
1.
2.
3.
Scientific Method
Experimental Design
Tables and Graphs
Regression
Relationships are mathematical descriptions
of the comparability of data.
On graphs there are four basic types.
The shape or appearance of the data gives
hints as to the algebraic formula needed to
model the data.
Four types of relationships
Direct Proportion
Direct Variance
Indirect Proportion
Indirect Variance
Circle Lab relationship
The circle lab data indicates that circumference
and diameter are a direct proportion…therefore
a linear function model
Using a straight edge,
draw a line through the
points
C
D
Use the line to make the
regression equation
Linear function is
y = mx + b
y2
C
Start by finding the slope, m
m = y2 – y 1 / x2 – x1
y1
x1
D
x2
What was your slope?
Replace the y and x with the units on each axis