Posted by Ifi on Sunday, October 28, 2012 at 12:32am.
the largest value for f(8) would be where the slope is a maximum (1.8) for 1<=x<=8. That would be the line (y+2)/(x-1) = 1.8 y = 1.8x - 3.8 f(8) = 10.6
Thanks steve