Problema Solution
The percentage of homes with digital TV services stood at 5% at the beginning of 1990 (t=0) and was projected to grow linearly so that, at the beginning of 2003 (t=4), the percentage of such homes was 25%.
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The percentage of homes with digital TV services stood at 5% at the beginning of 1990 (t=0) and was projected to grow linearly so that, at the beginning of 2003 (t=4), the percentage of such homes was 25%.
Let y represnt % of homes with digital TVs, t be the time .
(0,5),(4,25) are two points.
slop m=(y2-y1)/(x2-x1). =(25-5)/4 =5.
The linear equation is y-5=5(t-0).
y-5=1.25y.
y=5t+5.