Determine whether the situation or equation represents direct or inverse variation.The frequency that you brush your teeth and the length of time that you retain all your teeth
A. Direct
B. Inverse
Answer: A
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Find the reciprocal of the expression.
A. 
B. 
C. 
D. 
Suppose that y is directly proportional to x. Use the given information to find the constant of proportionality k. Then use y = kx to find y for the given value of x.y = 39 when x = 6;
Find y given x = 12.
A. k = 6.5; y = 78
B. k = 234; y = 
C. k = 6.25; y = 75
D. k = 6.5; y = 90
Solve the problem.The stock market gained 57 points on Tuesday and lost 40 points on Wednesday. Find the difference between these changes.
A. -97 points B. 97 points C. 17 points D. -17 points
Use transformations to graph the function. Determine the domain, range, and horizontal asymptote of the function.f(x) = -2x+3 + 4
A. domain of f: (-?, ?); range of f: (-4, ?);
horizontal asymptote: y = 4
B. domain of f: (-?, ?); range of f: (-?, -4);
horizontal asymptote: y = -4 
C. domain of f: (-?, ?); range of f: (-?, -4);
horizontal asymptote: y = -4
D. domain of f: (-?, ?); range of f: (-?, 4);
horizontal asymptote: y = 4