2.  Jeff’s Wholesale Auto Dealership holds an auction once a month. What is the average number of cars sold at the auction for the past 6 months? Month 1: 288 carsMonth 4: 558 car Month 2: 432 carsMonth 5: 366 cars Month 3: 330 carsMonth 6: 258 cars a)318.9 cars b)350 cars c) 446.6 cars d) 372 cars ANSWER - D

3.  What is the y intercept of the equation 6x² + y = 18 A. (0, 18) B. (0,3) C. (18, 0) D. (3,0) ANSWER – A Put in standard form y=-6x² + 18 Make x = 0 and solve for y y=6(0)² + 18 y = 18

4. The graph of the function F(x) = x² has been translated so that its new vertex is (2,1). What is the new equation of the function in standard form? A) F(x)=x² -4x +5c) F(x)= x² -2x +1 B) F(x)= x² +4x +1d) F(X) = x² + 2x -1 Answer – A First put into vertex form –> F(x) = (x -2)² + 1 Remembering to switch the sign for the x value. Then FOIL it out

5. Which of the following quadratic equations in standard form has the vertex of (1, -1) A) F(x) = -2x² -4x +1 B) F(x) = 2x² -4x +1 C) F(x) = -2x² +4x +1 D) F(x) = 2x² +4x -1 ANSWER – B Find the vertex of each function using the –b/2a formula

6. Nina wanted to see whether doctors or nurses work more hours in a 5 day work week. She interviewed random doctors/nurses and asked them how many hours a week they work. Looking at the chart, which data set has the lowest mean? A. Doctors C. Cannot be Determined B. B. Nurses D. They have the same mean ANSWER – B Add up all the data points and divide by 5. Who has the lowest mean? Nurses4850494751 Doctors5354535152

7. Simplify 2 ³ A) 1/8B)-8 C) -6D) -1/8 ANSWER – A This is a simple calculator question. Type it in and solve. You’ll get 0.125. Take 1 divided by 8 to get your answer Look for the ^ button or the X button

8. Which of the following is the solution to: 2x -3 ≤ 7 A) -2 ≤ x ≤ 7c) x ≤ 5 B) x ≥ 2 d) -2 ≤ x ≤ 5 ANSWER – D It is an AND problem. So… -7 ≤ 2x – 3 ≤ 7. Add 3 to both sides and divide by 2

9. Simplify the expression 3i(-4 + i) and express as a complex number in standard form. A) -3- 12i B) -3 -21i C) -12i +3i² D) i(-12 + 3i) ANSWER – A Multiply it out to get -12i + 3i². Replace i² with -1

10. Which of the following arithmetic series has a sum of 100 A) Σ 5 +3 (n+2)B) Σ 4+2(n+3) C) Σ 6+3(n+3)D) Σ 5 = 3(n-1) ANSWER – A Start with 1 and sub in for n up to 5. Add up the numbers until you get 100 5 n=1 5 5 5

11. What is the domain of the function y = x³? A. 0 ≤ x ≤ ∞ B. 3 ≤ x ≤ ∞ C. -∞ ≤ x ≤ ∞ D. 0 < x < ∞ ANSWER – C Remember, the domain is all real numbers Domain Hint When in doubt ALL REALZ

12. Andrea began an exercise program on Monday. The first day she did 10 sit-ups. Each day she added 5 more sit-ups. How many sit-ups will she have done at the end of the first Saturday of her program? A) 35c) 135 B) 100d) 155 ANSWER – A Monday 10, Tuesday 15, Wednesday 20, Thursday 25 Friday 30, Saturday 35

13. Joe decided to investigate whether HS girls or HS boys have higher EOCT scores. To do this he took a random sample of EOCT scores of both boys and girls. To come to his conclusion, Joe averaged the test scores for each group and compared the two. What are being compared? A) Male and female test scores B) Average EOCT scores for boys C) Average EOCT scores for girls D) Average EOCT scores of boys and girls Answer – D Look at the underlined section of what exactly is being compared

14. Find the domain of the inverse for the following function y = x³ A) 0 ≤ x ≤ ∞c) - ∞≤ x ≤ ∞ B) 3 ≤ x ≤ ∞d) -∞ ≤ x ≤ 0 ANSWER – C Remember it is a cubic function, a cubic function and its inverse have a domain of all real numbers. HINT – when in doubt….ALL REALZ

16.  What is the linear regression equation for the chart below  A) y = 3x  B) y = 2x + 1  C) y = 2x + 5  D) NOT LINEAR ANSWER – B This is a calculator question. Press 2 nd DATA and select 2 var. Then press DATA and enter your x and y values. Press STATVAR to find your equation in y = ax + b xY 25 37 49 511

18. Compare the standard deviation of Louise and Thelma’s bowling scores. Whose standard deviation is higher? A) Thelmac) they are the same B) Louised) cannot calculate ANSWER – B On your calculator press 2 nd DATA and 1-VAR. Enter your x values with FRQ as 1. Press STATVAR and find Ơx T85176111201159187134 L998310217512679223

19. Given y = ½(x – 2)² + 1, what is the vertex? A) (2, 1)B) (2, -1) c) (-2, 1)D) (-2, -1) ANSWER – A The vertex is ALWAYS the value inside the parenthesis with the value changed and