Quadratic Regression Using Desmos

Determine the curve of best fit using quadratic regression.

• y = -2.7x + 7.4

• y = 0.95x² - 2.08x - 0.75

• y = -.05x - 3.26

• y = 0.95x² + 2.08x + 0.75

What type of function does this scatterplot represent?

• constant function

• linear function

• quadratic function

• cubic function

When using Desmos to find the curve of best fit for a quadratic function, what do I need to enter?

• y₁ ~ mx₁ + b

• y₁ ~ ax₁³ + bx₁² + cx₁ + d

• y₁ ~ ax₁² +bx₁ + c

• y = ax² + bx + c

Look at this curve of best fit. Read off the graph and determine what the y value would be when the x value is 7.

• 260

• 240

• 140

• 320

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

• y = 4x² + 1

• y = 3x² + 8x - 3

• y = 4x²

• y = 3x² + 3x - 1

When finding the curve of best fit in Desmos, what do I do after I entered my table of coordinates?

• plot the points

• y₁ ~ ax₁ +b

• y₁ ~ ax₁² +bx₁ + c

• do a little dance

Which would best fit the following data: {(-15, 53.5), (-14, 28), (-3, 18), (0, 4), (6, 27), (14, 50)} Hint: Put the table or points into DESMOS and look at what shape they take

• Line of best fit

• Curve of best fit

Find the quadratic equation for the relationship of the horizontal distance and the height of the ball.

• -18x² + 2.11x + 4.21

• -.06x² +1.06x + 7.9

• -6x² +1.06x + 79

• -.12x² + 2.11x + 4.22

Which would best fit the following data:

{(-15, 53.5), (-14, 28), (-3, 18), (0, 4), (6, 27), (14, 50)}

Choose ALL correct answers.

• Linear Regression

• Quadratic Regression

• Line of Best Fit

• Curve of Best Fit