Unit Test — Unit test Answers

Which graph represents the same relation as the table below?xf(x)–25011–12–3

If h(x) is the inverse of f(x), what is the value of h(f(x))?

Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?

If s(x) = 2 – x2 and t(x) = 3x, which value is equivalent to ?

Which characteristic of a data set makes a linear regression model unreasonable?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4?

If , what is ?

If a(x) = 3x + 1 and , what is the domain of ?

Which equation represents a graph with a vertex at (–3, 2)?

A salesperson earns $200 a week plus a 4% commission on her sales. Which equation models the relationship between her sales in a given week, s, and her weekly earnings, e?

Which graph represents an odd function?

Which of the following is an even function?

Given and , for which value of does ?

The scatterplot shows the distance (in feet) that a person was from a motion sensor during an experiment in math class. Use the labeled points to create a linear model. About what distance in feet (y) would a person be 8 seconds after the experiment begins?

In which quadrant is the number 6 – 8i located on the complex plane?

Given , what is the average rate of change in f(x) over the interval [1, 5]?

The cost, c, of a ham sandwich at a deli varies directly with the number of sandwiches, n. If c = $54 when n is 9, what is the cost of the sandwiches when n is 3?

Which function is most likely graphed on the coordinate plane below?

The table shows the population of Center City in various years. Use the data from 1990 and 2005 to create a linear model that predicts the population of the city (y) in a given year (x). In which year was the actual population of Center City most different from the value predicted by this model?YearCity Population1985194,9571990197,8001992199,5322000203,7502005206,5612012210,600

What is the absolute value of the complex number ?