58. to get the slope of the perpendicular line you take the reciprocal of 1/5 and change the sign. so the slope is 5. then use the equation (yy1) = m(xx1) where m=5, y1=8, and x1=6. so thats (y8) = 5(x  6) + 11 which is the same as y = 5x + 3361. just think of f(x) as y soy=3x7 and y=1plug in 1 to the first equation1=3x7solve for x6=3xx=256. that factors out to (3x4)(x+5) / (2x+1)(x+5)the factors (x+5) cancel out so thats (3x4) / (2x+1)the bottom part, (2x+1), cant equal 0so 2x+1=0 when x = 1/2
