5.7 Day 2 Quizizz - Linear Regression

A linear regression is the same as a line of best fit.

• true
• false

Tags

CCSS.8.SP.A.2

Which calculator sequence is used to find the values for the line of best fit after inputting the data into L1 & L2?

• STAT --> CALC --> 4: LinReg(ax+b)

• STAT --> EDIT--> Edit

• 2nd --> STAT PLOT --> PLOT 1

• 2nd --> CALC --> value

Describe the correlation in the graph shown.

• Positive

• Negative

• No correlation

What type of correlation best describes the scatterplot shown.

• Positive

• Negative

• No correlation

What type of correlation does this graph have?

• Positive

• Negative

• No correlation

What is the line of best fit for the data?

• y = .25x + 8.25
• y = 8.25x + .25
• y = x + 1

Tags

CCSS.8.EE.B.5

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

• $y=\frac{3}{2}x+12$

• $y=12x+\frac{3}{2}$

• $y=\frac{2}{3}x-8$

• $y=-8x+\frac{2}{3}$

A restaurant sells pizza for the prices in the data table. Using the linear regression equation, what would the price of a pizza with 9 topping cost?

• $24

• $25.50

• $30

• $27

What is the line of best fit?

• f(x)= 5x+1.82

• cannot be determined

• f(x)= 1.82x + 5.02

• f(x)= 1.1x + 4.2

Using your linear regression, what is y when x is 30?

PLUG IN 30 for x!

• 61.59

• 52.46

• 57.94

• 59.76