Linear Regression, Quadratic Regression, & Sig Figs

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

Determine which linear or quadratic equation best fits the data.

• y = -2.7x + 7.4

• y = 0.95x² - 2.08x - 0.75

• y = -.05x - 3.26

• y = 0.95x² + 2.08x + 0.75

Round 1009 to three sig figs

• 100
• 101
• 1010
• 1000

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

How do I find…

When an object hits the ground?

• Find the x-value using the axis of symmetry

• Find the axis of symmetry and substitute it into the equation

• Find the y-intercept

• Find the x-intercepts and choose positive value

How do I find…

The time it takes to get to the highest point?

• Find the x-value using the axis of symmetry

• Find the axis of symmetry and substitute it into the equation

• Find the y-intercept

• Find the x-intercepts and choose positive value

How do I find…

The highest point?

• Find the x-value using the axis of symmetry

• Find the axis of symmetry and substitute it into the equation

• Find the y-intercept

• Find the x-intercepts and choose positive value