Strength of Correlation — Cumulative exam Answers

Susu is solving the quadratic equation 4x2-8x-13=0 by completing the square. Her first four steps are shown in the table.

What are the domain and range of f(x) = 4x – 8?

The image shows a geometric representation of the function f(x) = x2 – 2x – 6 written in standard form.

Ava graphs the function h(x) = x2 + 4. Victor graphs the function g(x) = (x + 4)2. Which statements are true regarding the two graphs? Select three options.Ava’s graph is a vertical translation of f(x) = x2.Victor’s graph is a vertical translation of f(x) = x2.Ava’s graph moved 4 units from f(x) = x2 in a positive direction.Victor’s graph moved 4 units from f(x) = x2 in a positive direction.Ava’s graph has a y-intercept of 4.

The tile along the edge of a triangular community pool needs to be replaced.

The minimum of the graph of a quadratic function is located at (–1, 2). The point (2, 20) is also on the parabola. Which function represents the situation?

Ali graphs the function f(x) = –(x + 2)2 – 1 as shown.

Simplify the expression –3(x + 3)2 – 3 + 3x. What is the simplified expression in standard form?

Maria gathered the data in the table. She finds the line of best fit to be y = 2.78x – 4.4.

Which sample fairly represents the population? Select two options.using a yearbook to determine the most popular names for girls in the United Statesasking the people exiting a vitamin store how often they exercise to determine the amount of time the average American exercisescalling every registered member of the national Republican Party to determine the voter turnout for a city’s mayoral racesending a mandatory and confidential e-mail survey to every tenth employee of a company to determine overall job satisfactiontaking a poll in the main hallway between classes to determine the number of students who would be interested in a school trip to New York City