Linear Regressions

Linear regression

by Sokhna Kabore

​Linear Regression using Desmos.com

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​Vocabulary

​More vocabulary

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Multiple Choice

The linear regression equation is y = 61.93x - 1.79.  Use the equation to predict how far this person will travel after 10 hours of driving.

• 10 miles
• 617.5 miles
• 0.19 miles
• 500 miles

Multiple Choice

The linear regression equation is y = 61.93x - 1.79.  According to the model, the slope can be interpreted as:

• After 0 hours of driving, they went 61.93 miles.
• They drove at a speed of 61.93 miles per hour.
• They drove 61.93 miles total.
• They drove 61.93 hours total.

Multiple Choice

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

• y = 1.5x + 12
• y = 12x + 1.5
• y = 0.67x - 8
• y = -8x + 0.67

Multiple Choice

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Released Staar Exam Questions​

Multiple Choice

• weak negative correlation

• weak positive correlation

• strong positive correlation

• strong negative correlation

Multiple Choice

Which situation best represent causation ?

• A. When the number of bust stops increases, the number of sales cars decrease

• B. When fewer firefighters report to the firhouse, the damage causes by the fire decreases

• C. When Ice cream sales increases, incidents of small burns increases

• D. When it rains several inches, the water level of the lake increases. 

Multiple Choice

• 8.50%

• 2.5 %

• 6%

• 10%

Multiple Choice

• y=-1.6 x+111

• y=3.5x+85

• y=2.5 x+90

• y=-3.3x+130