Question 178181
When you have the points
({{{x[1]}}},{{{y[1]}}}) and
({{{x[2]}}},{{{y[2]}}})
the equation to plot a line is
{{{(y - y[1]) / (x - x[1]) = (y[2] - y[1]) / (x[2] - x[1])}}}
The problem gives you
(0,32) and 
(10,60)
{{{(y - 32) / (x - 0) = (60 - 32) / (10 - 0)}}}
{{{(y - 32) / x = 28 / 10}}}
{{{(y - 32) / x = 2.8}}}
{{{y - 32 = 2.8x}}}
{{{y = 2.8x + 32}}}
Now solve for {{{x}}} at the point (x,100)
{{{100 = 2.8x + 32}}}
{{{2.8x = 68}}}
{{{x = 68/2.8}}}
{{{x = 24.29}}}
If {{{x=0}}} represents the year
1994, then {{{x = 24}}}
represents the year {{{1994 + 24 = 2018}}}
I can check by seeing if the slope from
(10,60) to (24.29,100) is 2.8
{{{100 - 60) / (24.29 - 10) = 2.8}}}
{{{40/14.29 = 2.8}}}
{{{2.8 = 2.8}}}
OK