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Unformatted text preview: he following equations defines a function containing the (x,y) pairs (1,–1), (2,– 4), (3,–9), and (4,–16) ? (A) y = –2x (B) y = 2x (C) y = x2 (D) y = –x2 (E) y = –2x2 The figure below shows a parabola in the xyplane. 4. Which of the following is the equations best defines the graph shown below in the xy-plane? 2. (A) (B) Which of the following equations does the graph best represent? (A) x = (y – 2)2 – 2 (B) x = (y + 2)2 – 2 (C) x = –(y – 2)2 – 2 (D) y = (x – 2)2 + 2 (E) y = (x – 2)2 – 2 3. In the xy-plane, which of the following is an x2 equation whose graph is the graph of y = 3 translated three units horizontally and to the left? (A) (B) (C) (D) (E) y = x2 x2 +3 3 x2 y= −3 3 ( x − 3)2 y= 3 ( x + 3)2 y= 3 y= 1 x2 1 x= 2 y y= x= 1 y2 1 y2 1 (C) (D) (E) 5. |x| = y= x2 ABC Company projects that it will sell 48,000 units of product X per year at a unit price of $1, 12,000 units per year at $2 per unit, and 3,000 units per year at $4 per unit. Which of the following equations could define the projected number of units sold per year (N), as a function of price per unit (P)? (A) (B) (C) (D) (E) N= N= N= N= N= 48, 000 P2 + 2 48, 000 P2 48, 000 P + 14 48, 000 P+4 48, 000 P2 + 8 www.petersons.com 262 Chapter 15 RETEST Answer the following 10 questions, limiting your time to 15 minutes. Note that question 1 is a grid-in question, in which you provide the numerical solution. (All other questions are in multiple-choice format.) 1. What is the fourth term in a geometric series with first term 2 and third term 72? 4. If –32 = − 1 2 (A) –16 (B) –6 (C) –5 (D) 5 (E) 16 () M , then what is the value of M ? 5. 1 1 If f(x) = x + 1 , then f x + 1 = (A) x () (B) 2. What is the intersection of the set of all positive integers divisible by 4 and the set of all positive integers divisible by 6? (A) All positive multiples of 4 (B) All positive multiples of 6 (C) All positive multiples of 8 (D) All positive multiples of 12 (E) All positive multiples of 24 The shaded regions of the xy-plane shown below represent certain values of x. 7. (C) (D) (E) 6. x +1 2 1 x+1 x +1 x+2 3. If f(x) = y = 1 – x2, and if the domain of x is...
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This note was uploaded on 08/15/2010 for the course MATH a4d4 taught by Professor Colon during the Spring '10 term at Embry-Riddle FL/AZ.

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