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Am20 S Oct27

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  • 1. 1. One endpoint of a segment AB is A (­3, 6). If the coordinates of the midpoint are (1, 2), find the  coordinates of B.  Answer: (5, ­2).
  • 2. 2. A seaport is located at P(­9, 4), a fishing boat is located at B(3, 7), and a yacht is located at Y(7, ­5).  Calculate to two decimal places the distance between: a) the boat and the yacht Answer: 12.7 b) the port and the boat Answer: 12.4 c) the port and the yacht. Answer: 18.4
  • 3. 3. Find an equation for the line passing through A (3, 6) and B(­4, 8). Answer: y=
  • 4. 4. Express 4x ­ 2y + 6 = 0 in the form y = mx + b. What is the slope? What is the y­intercept? Answer: y = 2x+3 The slope m = 2 The y­intercept b = 3
  • 5. 5. Write an equation the form y = mx + b for the line that is perpendicular to x + y = 4 and has an x­intercept  of 2. Answer: y = x ­ 2