Chapter 2 Knowledge Check Answer Key

Knowledge Check 2.1

2. a. [latex]T = 90+0.5x[/latex]

d. 140 minutes

Knowledge Check 2.2

1. Slope: [latex]\frac{212°F - 32°F}{100°C - 0°C}=\frac{180°F}{100°C}=1.8 \frac{°F}{°C}[/latex]
2. Using the point (0°C, 32°F): [latex]$32 = a +1.8(0)[/latex], so a = 32°F
3. F = 32 + l .8°C.  So putting in C = 20, we have [latex]F =32+1.8\times 20 = 68°F[/latex]

Knowledge Check 2.3

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

Knowledge Check 2.4

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