Topic Test Answers

From the graph shown below, what happens to the y- values as the negative x- values get closer to zero? a. They increase c. They stay the same b. They decrease d. cannot be determined from the graph Please select the best answer from the choices provided

Given that , What is the value of f(x) when x = 2? a. 2.5 c. 1 b. 2 d. 0.5 Please select the best answer from the choices provided

If y varies directly as x and y = 49 when x = 7, what is the value of y when x = 3?a.7b.9c.49d.21

Solve: a. x = 40 c. x = 20 b. x = 10 d. x = 15 Please select the best answer from the choices provided

The variables x and y vary directly. Use the given values to write an equation that relates x and y. x = 20 y = 10 a. c. b. d. Please select the best answer from the choices provided

The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 11 miles? Round your answer to the nearest unit.a.247 unitsb.228 unitsc.264 unitsd.290 units

State the relationship between the graphs of f(x) and g(x). a. g is closer to the x-axis, and f is closer to the y-axis. b. g is symmetric about the y-axis, and f is symmetric about the x-axis. c. g is closer to the y-axis, and f is closer to the x-axis. d. g is symmetric about the y-axis, and f is symmetric about the origin. Please select the best answer from the choices provided

For the function defined by , What is the constant of proportionality? a. 150 c. 15 b. undefined d. 1500 Please select the best answer from the choices provided

Find the y-intercepts of the graph ? a. (2, 0) and (-2,0) c. There are no y-intercepts b. (-1,0) and (1, 0) d. y-intercept is (-3, 0) Please select the best answer from the choices provided

From the graph shown below, what happens to the y- values as the positive x- values get closer to zero? a. They increase c. They stay the same b. They decrease d. cannot be determined Please select the best answer from the choices provided

Explain why no part of the graph appears below the x-axis? a. The y-value is always negative c. The y-value is always zero b. The y-value is always positive d. The y-value is always 10 Please select the best answer from the choices provided

For the function defined by , What is the constant of proportionality? a. 120 c. 12 b. undefined d. 1200 Please select the best answer from the choices provided

Using the patterns of inverse variation, complete the following table if y is inversely proportional to the cube of x:x0.5126y648?0.037a.1c.4b.2d.8

Choose the equation that models the following statement: The pressure, P, of a given mass of a gas in a closed cylinder varies inversely as the volume, V, of the cylinder. a. P = kV c. b. d. Please select the best answer from the choices provided

For the function defined by , if x is doubled, what is the effect on y? a. y is quartered c. y stays the same b. y is doubled d. y is tripled Please select the best answer from the choices provided

If 2.5 pounds of a certain grain cost $1.75, how much will 5.3 pounds of the grain cost?a.$4.79b.$4.38c.$3.62d.$3.71

What does the graph of an inverse variation look like?a.sloping below the x-axisc.sloping positivelyb.sloping negativelyd.horizontal line

If 7 sandwich rolls cost $1.54, how much will 30 rolls cost?a.$12.78b.$10.78c.$6.60d.$7.60

If 2 egg rolls cost $1.20, how much will 10 egg rolls cost?a.$7.00b.$2.40c.$6.00d.$4.40