Quadratic Regression Equation

Which of the following quadratic equations best represents the following data?

• y = 7x² - 3x

• y = 3x² - 2x + 1

• y = 6x² + 3x - 2

• y = 7x² - 3x + 1

Given the set of data, estimate what the value of y will be when x = 14. Round your answer to the nearest tenth.

• 340

• 200.5

• 343.4

• 433.2

Determine the curve of best fit.

• y = -2.7x + 7.4

• y = 0.95x² - 2.08x - 0.75

• y = -.05x - 3.26

• y = 0.95x² + 2.08x + 0.75

The equation of the parabola that best fits a set of data is called

• quadratic formula

• quadratic regression

• quadratic standard form

• quadratic function

Determine the curve of best fit.

How high was the ball when it was initially (first) thrown? Choose the best answer.

• 0 feet because this is the y-intercept.

• 3 feet because this is the y-intercept.

• 4 seconds because this is the axis of symmetry.

• 5 feet because this is the y-value of the vertex (highest point).

What key feature tells the initial height of the roller coaster?

• y-intercept

• positive root/

  x-intercept

• x of vertex

• y of vertex