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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 xyplane? 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 xyplane, 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 gridin question, in which you provide the numerical solution. (All other questions are in multiplechoice 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 xyplane 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 EmbryRiddle FL/AZ.
 Spring '10
 Colon
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