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May 24th

May 24th

# Math Homework and Quiz #2 Task List

 Homework Preparation Homework problems 1. Read Section 1.3: Don’t forget about the animations in the on Formulas /linearequations-4.html">line textbook , located in Chapter Contents. 2. Watch the Section 1.3 Videos located in Chapter Contents. My MathLab HW 2 #1-20 1. Read Section 1.4: Don’t forget about the animations in the online textbook, located in Chapter Contents. 2. Watch the Section 1.4 Videos located in Chapter Contents. 3. Online graphing calculator tutorial (Chapter Contents – Tools for Success – Graphing Calculator Tutorial): In the “Basic Statistics and Probability” folder, go through “Finding the Line of Best Fit.” 4. Read 1.4 Linear Regression Help Sheet, available via Course Documents – Graphing Calculator Help. (Helpful for HW2 #41-43.) MyMathLab HW2 #21-43 1. Read Section 1.5: Don’t forget about the animations in the online textbook, located in Chapter Contents. 2. Watch the Section 1.5 Videos located in Chapter Contents. MyMathLab HW2 #44-57 1. Read Section 1.6: Don’t forget about the animations in the online textbook, located in Chapter Contents. 2. Watch the Section 1.6 Videos located in Chapter Contents. MyMathLab HW2 #58-67
 Quiz Preparation Quiz Complete HW2 with a score of at least 80% by 11:59pm on your HW due date. Take Quiz2 up to ten times by 11:59pm on your quiz due date. Your best score will count.

Reminders:
• Keep all of your written work in your journal. Take notes on all videos and textbook sections, and
show your work on every homework problem and quiz question. Don’t forget to label everything with
the section number and whatever other information is applicable, including page number, problem
number, type of resource (video, animation, View an Example, etc.).
• No late work will be accepted. Don’t wait until the last minute! Time will be based on the
MyMathLab server time, not the clock on your computer.

## Section 1.3 Linear Functions, Slope, and Applications, pp. 97-109, Brief Summary

Linear Functions and Slope:
The graph of a linear function is a _______________________.
Slope m of a line containing the points is given by m =
Horizontal and Vertical Lines: Do Example 2 from your text below. Graph each linear equation and
de
termine its slope.

Slope-Intercept Form: A linear function f given by f(x) = _________________ is written in slope-intercept
form. The constant m is called the _______________, and the y-intercept is ( ____ , ____ ) .

## Section 1.4 Equations of Lines and Modeling, pp. 115-123, Brief Summary

Point-Slope Equations of Lines:
The point-slope equation of the line with slope m passing through the point is
_____________ = ____________________

Do Example 3: Find an equation of the line containing the points (2,3) and (1,− 4) .
Use the Point-Slope method:

Parallel and Perpendicular Lines:
If two lines are parallel, then their slopes are ______________________.
If two lines are perpendicular, then the _______________ of their slopes is ________.

Linear Regression: Read through Example 7 in your book, and try these steps on your calculator . For
more detailed instructions and some shortcuts, go to Course Documents in MyMathLab. Look for Graphing
Calculator Help, and then the 1.4 Linear Regression Help Sheet.

One-time setup: To get your calculator to display the correlation coefficient r, you will need to do the
fol lowing only once. Choose Cata log (2nd 0), and arrow down until you find DiagnosticOn. Push Enter
twice, and you should see Done on your screen.

Enter data into lists:
1. Push the STAT button, and select Edit.
2. Clear any old data.
i. Use your arrows to highlight the list name.
ii. Push CLEAR.
iii. Push Enter. Repeat for any other lists.
3. Type the data into L1 and L2. Your screen should look like

To view a scatter plot of the data :
1. Push STAT PLOT (2nd Y=), and select 1:Plot1.
2. Turn Plot1 on by highlighting ON, and pushing Enter.
3. Make sure that the first type of graph, a scatterplot, is highlighted.
4. Make sure that L1 and L2 are listed as the Xlist and Ylist,
respectively.
5. Set an appropriate WINDOW for your data, and push GRAPH.

To find the regression line:
1. Push the STAT button, and arrow over to CALC.
2. Select #4:LinReg(ax+b), and hit Enter. LinReg should appear on your home screen.
3. Push Enter again, and you should get the screen at the
right.
4. The line of regression is, therefore,
y = 2.863095238x + 76.74166667 . The value of r
displayed is the correlation coefficient; see the
discussion of correlation coefficients at the bottom of
p.123.
5. By typing the regression line equation into your Y= screen and
then hitting Graph, you can see the line and the data on the
same graph.

## Section 1.5 Linear Equations, Functions, and Zeros, pp. 129-143, Brief Summary

Zeros of Functions : An input c of a function f is called a zero of the function if the output for the function
is __________ when the input is ________. In other words, c is a zero of f if f ( _____ ) = ______ .
Do Example 11 algebraically. Find the zero of f (x) = 5x − 9 .
Algebraic Solution:

Formulas: Do Example 12. Solve P = 2l + 2w for l.

## 1.6 Solving Linear Inequalities, pp. 150-153, Brief Summary

Linear Inequalities:
When both sides of an inequality are multiplied (or divided) by a negative number , we must
____________ the inequality sign .
Do Example 1b. Solve and then graph the solution of 13 − 7x ≥ 10x − 4

Compound Inequalities:
Do Example 2. Solve and then graph the solution of − 3 < 2x + 5 ≤ 7

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