3. What is the value of k when y = 8 and x = 2, and y is varies directly as x? a. 2 b. 4 с. -2 d. -4 4. If y varies directly as x such that when x - 3, y-12, find y when x = 4. b. 18 а. 16 C. -16 d. -18 5. If y varies directly as the of x, and y = 15 when x = 3, find y when x = 6. a. 30 %3D b. 35 с. 20 d. 25 6. What is y, if y is directly proportional to x, and x = 4 and k = 3? a. 7 b. 8 с. 10 d. 12 7. When y is varies inversely as x, find the value of k when x = 2 and y = 3. b. 2 a. 1 с. 3 d. 6 8. If y varies inversely as x, and y when x = 6, find y when x 2. a. 3 b. 2 с. 1 d. -3 9. If y varies inversely as x, and y = when x 12, find y when x = 3. a. 1 b. 2 С. 3 d. 4

Express each value as a percent. a. 1 b. 112 c. 234 d. 0.5

If y varies directly as x and y=3 , when x=10 , find the equation that relates x and y.

Find each percentage. Round the answers to 2 decimal places when necessary. 25. 1514of 3514

Express each value as a percent. a. 0.72 b.2.037 c. 125 d. 0.0003

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shares of your stocks. 2. Given the program here, add the necessary statements to compute four new variables: Weight in kilograms (1 kg = 2.2 pounds). Name this variable WtKg. Height in centimeters (1 inch = 2.54 cm). Name this variable HtCm. a. c. d. e. Average blood pressure (call it AveBP) equal to the diastolic blood pressure plus one-third the difference of the systolic blood pressure minus the diastolic blood pressure. A variable (call it HtPolynomial) equal to 2 times the height squared plus 1.5 times the height cubed. Here is the program for you to modify: data Prob2; input ID $ Height / in inches */ Weight /* in pounds */ SBP /* systolic BP */ /* diastolic BP */; DBP datalines; 001 68 150 110 70 002 73 240 150 90 003 62 101 120 80 ; title "Listing of Prob2" ; proc print data=Prob2; run;

9. Which of the following does not represent a proportional relationship? Trina gets paid $7 per hour to babysit. Joe the plumber charges an initial fee of $25, plus $50 per hour. Tickets to the movie are $9.50 per person. The tree grows 10 cm a month. А. В. С. D.