Question 72716
21 / (15 - 3x) = f(x)
Horizontal asymptope is at zero ... so all values are less than or greater than zero.
15 - 3x can't be zero
15 - 3x = 0
15 = 3x
5 = x
Values left or right of this asymptope are either greater than or less than zero.
Right of 5 ~> f(6) = 21 / (15 - 18) = 21 / (-3) = -7
x > 5
{{{graph(300,300,-1,9,-10,10,21/(15 - 3x))}}}