Question 403380
The debt can be thought of as a negative profit
Plot profit,{{{p}}} on the vertical axis and {{{t}}}, years
on the horizontal axis
{{{(p - (-2300)) / (t - 0) = (3300 - (-2300)) / (5 - 0)}}}
{{{(p + 2300) / t = 5600 / 5}}}
{{{5*(p + 2300) = 5600t}}}
{{{5p + 11500 = 5600t}}}
{{{5p = 5600t - 11500}}}
{{{p(t) = 1120t - 2300}}}
check answer:
After {{{5}}} years:
{{{p(5) = 1120*5 - 2300}}}
{{{p(5) = 5600 - 2300}}}
{{{p(5) = 3300}}}
OK