Solving Quadratic Equations: Quadratic Formula — Unit test Answers

Points and their residual values are shown in the table.

Marta’s mother shared a funny video of their cat on the Internet. The total number of people who had viewed the video over the first 30 days could be modeled using the function f(x) = 33(1.3)x where x is the number of days the video has been online.

The graph shows the relationship between the number of ounces of cereal in a box and the price of the cereal.

The table shows the time a patient spends at the dentist and the amount of the bill.

Rob is investigating the effects of font size on the number of words that fit on a page. He changes the font size on an essay and records the number of words on one page of the essay. The table shows his data.Which equation represents the approximate line of best fit for data, where x represents font size and y represents the number of words on one page?

The graph shows the relationship between the amount of change given from a $10 bill and the number of bagels purchased.

Ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails.

Consider the graph of the line of best fit, y = 0.5x + 1, and the given data points.

Janna is making a prediction of the frequency of a key that is 12 keys from middle C.

The approximate line of best fit for the given data points, y = −2x − 2, is shown on the graph.