Problema Solution
sales of a toy company increased linearly from $25,000 in 2000 to $40,000 in 2005. Write a linear equation that relates the sales y in year s where x=0 corresponds to 2000.
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let
y=kx + b, where k and b are constants
for x = 0 (corresponds to 2000), y = $25,000
25,000 = k*0 + b
b = 25,000
y=kx + 25,000
for x = 5 (corresponds to 2005 - 2000 = 5) we have y = $40,000
40000 = k*5 + 25000
by solving for k we find:
k = 3000
click here to see the step by step solution of the equation:
the linear equation is:
y = 3000x + 25000.