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Chapter 2 Knowledge Check Answer Key

Knowledge Check 2.1

1. Intercept Slope
a. y=6+3x 6  3
b. t=2n+4 4 2
c. 5s=10−5r 2 -1  (note that s=2−r)

2. a. T=90+0.5x

X T
0 90
80 130
150 165

d. 140 minutes

 

Knowledge Check 2.2

  1. Slope: 212°F−32°F100°C−0°C=180°F100°C=1.8°F°C
  2. Using the point (0°C, 32°F): $32=a+1.8(0), so a = 32°F
  3. F = 32 + l .8°C.  So putting in C = 20, we have F=32+1.8×20=68°F

 

Knowledge Check 2.3

  1. 120=0.5r+0.4s
  2. 80=0.3r+0.4s
  3. s=50
  4. r=200

 

Knowledge Check 2.4

  1. C=75,000+6.5x
  2. 13,637 bags
  3. 15,455 bags

 

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