Why might this group of toys not be a valid sample? Check all that apply.

Which relationships have the same constant of proportionality between y and x as the equation y= dfrac{5}{2}xy= 2 5 ​ xy, equals, start fraction, 5, divided by, 2, end fraction, x? Choose 3 answers: Choose 3 answers: (Choice A) A 5y=2x5y=2x5, y, equals, 2, x (Choice B) B 8y=20x8y=20x8, y, equals, 20, x (Choice C) C (Choice D) D (Choice E) E xy 1112 dfrac{1}{2}2

Marcus was asked to identify the vector that maps (triangle) def to (triangle) d e f . he drew a vector as shown and determined that the component form of the vector is (3, 1). explain his error.

Ravi is deciding how many people to take to the movies. The table below shows the cost for different sized groups of people. Number in group: 3, 5, 7 Cost (In dollars): 24, 40, 56 A) The cost for each person is not always the same. B) The cost for each person appears to be the same. Predicted cost for 8 people: $_

A train travels from City A to City B. The table below shows the distance and the amount of time it takes on the train. Distance (km) : 12, 24, 35 Time (In minutes) : 2, 4, 7 A. The train does not always go the same distance each minute. B. The train appears to go the same distance each minute. Predicted amount of time to travel 54 kilometers: __ minutes