The linear equation for a 2015 value of $156 that is increasing $5.50 per year is 5.50x + 156.
A linear equation takes the form of:
y = mx + c
In this instance:
y = 156
m = increase of $5.50
c = ?
x = 0 because this is the first year
The value of c:
156 = 0 x 5.50 + c
c = 156
The linear equation therefore is:
= 5.50x + 156
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