From November 12th to November 21st, The temperature in Burnaby, B.C. dropped an average of 1.7C each day. Suppose the temperature on the morning of November 12th was 11.4C. What was the temperature on the morning of November 21st?
There are nine days for the temperature to fall..........so.....
-1.7(9) + 11.4 = -3.9° C on Nov 21