Problema Solution
SUPPOSE THE SALES OF A PARTICULAR BRAND OF APPLIANCE ARE MODELED BY THE LINER FUNCTION S(X)=90X+4000, WERE S(X) REPRESENT THE NUMBER OF SALES IN YEAR X, WITH X = 0 CORRESPONDING TO 1982. FIND THE NUMBER OF SALES IN 1990
Answer provided by our tutors
X = 0 corresponds to 1982
X = 1 corresponds to 1982+1 = 1983
X = 8 corresponds to 1982 + 8 = 1990
S(8) = 90*8 + 4000
S(8) = 4,720 sales
There were 4,720 sales in the year of 1990.