... 1 976 17 4. 1 978 17 5. 1 979 17 6. 1 9 81 177. 1 982 17 8. 19 83 17 9. Percentage of households with: 18 0. 18 1. 18 2. 18 3. 18 4. 18 5. 18 6. 18 7. 18 8. central heating 18 9. 39 19 0. 43 19 1. 48 19 2. ... $3,800 10 5. $4,350 10 6. $2,900 10 7. $2,450 10 8. 10 9. 11 0. 11 1. 11 2. 11 3. 11 4. model answer: 11 5. The sales at this small restaurant during the week of October 7 to 13 th followed a fairly set pattern ... 48 19 2. 52 19 3. 55 19 4. 59 19 5. 60 19 6.64 19 7. television 19 8. 93 19 9. 95200. 962 01. 96202. 97203. 97204. 97205.98206. video 207. 208. 209. 210 . 211 . 212 . 213 . 214 . 18 215 . vacuum...