Topic Test Answers

From the graph shown below, what happens to the y- values as the x- values increase infinitely in the positive direction or decreases infinitely in the negative direction?

Explain why no part of the graph appears below the x-axis?

If 2.2 pounds of a certain grain cost $1.54, how much will 5.7 pounds of the grain cost?

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 12 miles? Round your answer to the nearest unit.

Find the y-intercepts of the graph ?

A project can be completed by 5 workers in 24 days. How many workers are needed to finish the project in 15 days? The time to complete a project is inversely proportional to number of people who are doing the project.

Given: r is inversely proportional to s. If r = 16 when s = 3, then write the formula for the relation between r and s.

If y varies directly as the and y = 448 when x = 8, what is the value of y when x = 9?

State the relationship between the graphs of f(x) and g(x).

If y varies directly as and y = 72 when x =3, what is the value of y when x = 6?

There are about 100 calories in 30 grams of Swiss cheese. Ruth ate 70 grams of this cheese. About how many calories were in the cheese that she ate if the number of calories varies directly as the weight of the cheese?