Scatterplots, Lines of Best Fit, Linear Regression

How many calories are in the smoothie that contains 62 grams of sugar?

• 250

• 270

• 280

• 290

How many grams of sugar are in the smoothie that contains 260 calories?

• 50

• 54

• 58

• 62

Describe the correlation of the data.

• Positive

• Negative

• No Correlation

Using Desmos.com make a scatter plot of the data. What is the correlation?

• Positive

• Negative

• No Correlation

The table shows the gross revenue y (in millions of dollars) for a movie each week for x weeks since its release. Using Desmos.com, write an equation that models the gross revenue as a function of the number of weeks since its release. Round to the tenths place.

The scatter plot shows the amounts x (in gigabytes) of random-access memory (RAM) and the prices y​ (in dollars) of 10 laptops.

What is the RAM of the $800 laptop?

• 4

• 8

• 12

• 16

The scatter plot shows the violent crime rate y​ (in crimes per $100,000 people) in Florida x​ years after 2010​ . The equation y = -14.3x + 514 models the data. The residuals are shown in the table. 

What is the strength and direction of the correlation?

• strong positive correlation

• strong negative correlation

• weak positive correlation

• weak negative correlation

What is the correlation between the pitcher's winning percentage and earned run average?

• Positive

• Negative

• No Correlation

What is the correlation between monthly income and body weight?

• Positive

• Negative

• No Correlation

Using Desmos.com, find an equation of the line of best fit for the data. Round the slope and the y-intercept to the nearest hundredth.

Select the correct line of best fit.