Author: CZ

Chapter 4 Review Sheet

Test-Friday, October 10th 2008
Chapter 4– Sections 1, 2, 3, 4, 5, 6, 8
Section 1:Coordinates and Scatter Plots:
Be able to label:
X-axis, y-axis, origin, quadrants, x and y values in quadrants and plot points
Draw a Scatter Plot from a set of Data, Draw a line of best fit and then predict using that line.
What will y be if x is 8?

x	1	2	3	4	5
y	3	7	9	12	13

Section 2: Graphing Linear Equations
If given
be able to put into y= form and then use a
table of values to find
what y is when x=-2,-1,0,1,2 Page 264 #6,7,10
Section 3: Quick Graphs Using Intercepts
To find a x-intercept, plug 0 into y and solve for x. Make sure to write the answer as a point (x,0).
To find a y-intercept, plug 0 into x and solve for y. Make sure to write the answer as a point (0,y).
To graph: find x and y intercepts, rewrite as points, plot the points and then draw a line connecting them.
Page 265 #10-13
Section 4: The Slope of a Line
Find slope between two points using formula for slope.
Be able to identify what negative, positive, undefined, and zero slope are. Page 265 #14-17
Be able to find the slope of a line by looking at a graph

Section 5: Direct Variation
Be able to find what the k value is.
Page 265 #18-21
Section 6: Quick Graphs Using Slope-Intercept Form
Where m=slope and b=y-intercept
Steps: Find slope (what is in front of x after equation is in y=mx+b form), find y-int (rewrite as a point). Plot the point and then graph the slope from that point.
Parallel and Perpendicular Lines:
Parallel– Same Slope
Perpendicular– Opposite Reciprocal
Page 266 #22-24
Section 8: Functions and Relations
Be able to know whether a graph or table of values is a function or not.
Understand function notation and be able to use it solve.
Page 266 #29-32