In Canada, the number of girls playing organized ice hockey from January 1990 to January 2010 increased by approximately 4162 girls per year. In January 2000, there were approximately 45 400 girls playing organized ice hockey.

Question

a. Write an equation in slope-point form to represent the number of girls, n, playing organized ice hockey as a function of the number of years, t, after 1990.

b. Use the equation in part a) to estimate the number of girls playing organized ice hockey in January 2009.

Answer 1

slope = 4162

but when t = 10, n = 45400
so
n - 45400 = 4162 (t-10)

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n at t = 19
n = 45400 + 4162(9)