Today in class students worked on understanding integers applied to changes in temperature and elevation.
Answers to HW: Lesson 2 1. 13 degrees Celsius 15 degrees Celsius 2. You may have different numbers for these... 5 degrees C -8 degrees C -0.7 degrees C 4 degrees C 3. Your number line diagram should have an arrow that starts at 80, is 20 units long, and points to the left. 80+(-20) Your number line diagram should have an arrow that starts at -13, is 9 units long, and points to the right. -13+9 Your number line diagram should have an arrow that starts at -5, is 8 units long, and points to the left. -5+(-8) 4. a. Proportional with 6 wheels per bus b. Not proportional; different trains have different number of cars 5. 8 cookies were left; he made 80 cookies, because (1.25)⋅64 = 80. 72 were sold, because (0.9)⋅80 = 72 and then 80−72 =8. Lesson 3 1. First table is Not proportional. Second table is Proportional. The constant of proportionality is 0.8 sale dollars per original dollar. 2. 36 m because 20+16=36 4 m because 20+(-16)=4 -11 m because 5+(-16)=-11 2 m because -9+11=2 -20 m because -9+(-11)=-20 3. Carbon: -6+6=0 Neon: -10+10=0 Oxide: -10+8=-2 Copper: -27+29=+2 Tin: -50+50=0 4. B, C, E 5. 43.6 -4.8 -93.4 51
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