Lesson 32

​Agenda:
1. Warm-up
2. Outliers in scatterplots
3. Solving two-step equations
4. Get More Math

Multiple Choice

After x hours of rainfall today, Yvette recorded the amount of rain in inches, y, in a rain gauge. The table shows the linear relationship for the recorded rainfall.

How many inches of rain was in the gauge before the rain began today, and what was the rate at which the rain fell in inches per hour?

• There was 0 inches in the rain gauge before the rain began, and the rain fell at a rate of 1.25 inches per hour.

• There was 2.5 inches in the rain gauge before the rain began, and the rain fell at a rate of 1.25 inches per hour.

• There was 3 inches in the rain gauge before the rain began, and the rain fell at a rate of 0.75 inch per hour.

• There was 1.5 inches in the rain gauge before the rain began, and the rain fell at a rate of 0.75 inch per hour.

We will identify outliers on scatter plots.

​

Multiple Choice

What is the coordinate point of the outlier?

• (4,55)

• (55,4)

• 4

• 55

Hotspot

The scatter plot below displays the results of a survey asking postal workers how many elentires and hapts they each have. Which point on the graph appears to be an outlier? Select one correct answer.

Fill in the Blanks

Multiple Choice

When finding the mean absolute deviation of a set of numbers, suppose the mean of the set is 42. Which formula should be entered into the L2 row in STAT?

• $$\sqrt[]{42\ +\ L1}$$

• $$\left|42-L1\right|$$

• $$42-L1$$

• $$\int_x^y42+L1$$

Multiple Choice

When finding the mean absolute deviation of a set of numbers, how do you find the absolute value operation?

• 2nd 1

• Stat Calculate

• Math->Number

• $$2nd\ \ x^2$$

Dropdown

The solution to the equation 2x-6=-8 is​

Select answer

​ Remember add 6 on both sides first then divide by 2 on both sides.

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