Curve of Best Fit

Calculate the quadratic regression function for this table of values to the nearest tenth.

• f(x) =
   2x² - 9x + 10
• f(x)=
   3x² + 9x - 10
• f(x) =
   3.1x² - 9.2x - 10.3
• f(x) =
  2.1x² - 8.6x + 10.1

Using the curve of best fit, what would be the output (y) when the input (x) is 7?

• 260

• 240

• 140

• 320

When using Desmos to find the curve of best fit, what do I need to enter first?

• y₁ ~ ax₁² +bx₁ + c

• the equation

• the table/chart of values

• the vertex

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

If this is an equation for a curve of best fit, find the output (y) when the input (x) is 13:

y = 1.2x² - 3.7x - 19

• -51.5

• 135.7

• 154.7

• 183,8

Given the following table of values, which column represents the input (x)?

• Days

• Money

• Both Days and Money

• Neither Days nor Money

Given the graph, what would be in the output (y) when the input (x) is 6?

• 1125

• 850

• 700

• 600

Given the following scatter plot, which equation best models the data?

(Hint: in this specific case, you don't really need Desmos)

• y = -8.25x + 56

• y = -8.25x² + 56x

• y = 8.25x² + 56x

• y = -8.25x³ + 56x