Question 1173606
1986 will be (1, 9.4), having the x-value = the year-1985
1989 is (4, 13.2)
point-slope formula y-y1=m(x-x1) m slope and (x1, y1) a point.
Slope is 3.8/3
therefore, y-9.4=(38/30)(x-1)
so y=(38/30)x+8.1333
or V=1.27x+8.13 rounded units % vacant
The slope of 1.27% is the increase in the %vacancy per year.
The 8.13% was the vacancy at year 0, or 1985.
in 1995, x=10 and V=12.67+8.13=20.80% vacant.


{{{graph(300,300,-10,11,-5,22,1.2667x+8.13333,9.4,13.2,20.8)}}}