Strength of Correlation — Cumulative exam Answers

The histogram shows the duration, in minutes, of movies in theaters.

A road is made in such a way that the center of the road is higher off the ground than the sides of the road, in order to allow rainwater to drain. A cross-section of the road can be represented on a graph using the function f(x) = (x – 16)(x + 16), where x represents the distance from the center of the road, in feet. Rounded to the nearest tenth, what is the maximum height of the road, in feet?

What is the vertex of the function f(x) = x2 + 12x?

A rectangle with an area of x2 – 4x – 12 square units is represented by the model.

A perfect square trinomial can be represented by a square model with equivalent length and width. Which polynomial can be represented by a perfect square model?

The graph of y = x2 + 11x + 24 is equivalent to the graph of which equation?

Priya is playing a game where she earns online badges for scoring higher than the mean score on a level. After the tenth level, she scores 3,540 points, which is 2 standard deviations above the mean score of 3,110 points.

A graph shows the horizontal axis numbered 4 to 16 and the vertical axis numbered 4 to 12. Points and a line show an upward trend.

The data in the table represent the height of an object over time.

What is the factored form of x2 – 6x – 16?

Mr. Walker is looking at the fundraiser totals for the last five years.

What is the difference of the polynomials?(5x3 + 4x2) – (6x2 – 2x – 9)

The two-way table represents data from a survey asking teachers whether they teach English, math, or both. Which is the joint relative frequency for teachers who teach math and not English? Round the answer to the nearest percent.

Which is a zero of the quadratic function f(x) = 4x2 + 24x + 11?

The two-way table represents data from a survey asking students whether they plan to attend college, travel, or both after high school. Which is the marginal relative frequency for students who plan to attend college? Round the answer to the nearest percent.

What is the product?

The frequency table represents the results of a survey comparing the average age of household members to the way that they watch non-network television.Madigan converts the frequency table to a conditional relative frequency table by row.Television Viewing MethodWhich value should she use for X? Round to the nearest hundredth.

The graph shows the function f(x) = (2.5)x was horizontally translated left by a value of h to get the function g(x) = (2.5)x–h.

What is the discriminant of the quadratic equation 2x + 5x2 = 1?

64, –48, 36, –27, ...