Question 761180
When the input is {{{n}}}, the output is {{{3(n-1)=3n-3}}}.
 
The fact that
{{{3=3*1}}} is the output for {{{2}}},
{{{6=3*2}}} is the output for {{{3}}}, and
{{{9=3*3}}} is the output for {{{4}}}
tells us that {{{3(n-1)}}} is the output for {{{n}}}.
 
The fact that as the input increases by 1, the output increases by {{{3}}} tells us that the slope is {{{3}}}, and the slope-intercept form of the equation bases on the point (n,y) = (1,0) would be
{{{y-0=3(n-1)}}} --> {{{y=3(n-1)}}}