When you finish your assessmentIn 2-3 complete sentences answer each question

1. How is the first unit going for you so far in this class?

2. If you are struggling what can you do differently for the assessment re-take as well as the next unit? Or if you are doing well, what things can you continue to do so you maintain your success?

3. How did the assessment go for you?

4. What suggestions do you have that could make the class better moving forward?

Application problems How to apply linear equations to real world situation

Most graphs come from a set of dataMost graphs are from a table of related data.

Today we are going to learn how to find the growth of those graphs using a table or data and our calculators.

Steps to find a linear regression equation 1. Clear your calculators. (2nd +) ( 7) (1) (2)

2. Hit Stat then enter

3. Create your list of x values in l1 and your y values in l2

4. Hit 2nd mode

5. Hit stat scroll right to calc and down to 4. LinReg (ax+b)

6. Then hit enter twice

*your results will give you ax= which is your slope times x

And your b= which is your b value (y intercept).

Once you have your equation …Write your equation as y=mx+b going over 2 decimals places.

To view your scatter plot

1.Hit 2nd y=

2.Then hit enter twice to turn your scatter plot on

3.Then adjust your window based on your data to see your scatter plot.

Once you have your scatter plot in view…

Enter your y=equation into y1 to see how well your line matches the scatter plot.

3 steps to find a linear regression line

1. Create a list of data in L1 and l2

2. Find your Linear regression equation

3. Graph it with your scatter plot to see if it matches the data

How to use the data

Years Gas cost

1 2.00

2 2.25

3 2.47

4 3.02

5 3.45

Enter the data into our lists

Find your linear regression equation

Check to see that it matches the scatter plot

Input values in for x to see future trends.

Y= .37x + 1.54

What will gas be in after 10 years? .37(10) + 1.54 = 5.24

Let’s walk through one on your worksheetLook and # 1 and enter the data into your lists

Find your linear regression equation

See what the height of a person with a femur 58cm will be.