Question 632659
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
If I am understanding your question properly
P = .15x -28    || As in y = mx + b, where m is the slope and b the y-intercept
m = .15
{{{drawing(300,300,   -100,100,-100,100,  grid(1),

graph( 300, 300, -100,100,-100,100,0,.15x-28))}}}