Use the cross product method to determine whether the two fractions are equivalent.
A. Yes
B. No
Answer: B
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Solve the problem.The slope of the tangent line to the hyperbola 5x2 - 7y2 - 217 = 0 at two points on the hyperbola is - 
. What are the coordinates of the points of tangency?
A. (7, 2) and (-7, -2) B. (5, 7) and (-5, -7) C. (7, -5) and (-7, 5) D. (7, -2) and (-7, 2)
Express the number in decimal notation.4.14 × 10-4
A. 0.0000414 B. -414,000 C. 0.000414 D. 0.00414
The function f is one-to-one. State the domain and the range of f and f-1. Write the domain and range in set-builder notation.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
B. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
C. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y is directly proportional to x. When x = 8, then y = 2.
A. k = 4; y = 4x
B. k = 
; y = 
x
C. k = 
; y = 
x
D. k = 6; y = x + 6