Answer:
They are neither parallel nor perpendicular, since slope are different and not related by any equation
Step-by-step explanation:
First arrange them according to general equation:
[tex]y = mx + c[/tex]
for the first equation :
[tex]5x + 6y = 18 \\ 6y = - 5x + 18 \\ { \boxed{y = - \frac{5}{6} x + 3}}[/tex]
for the second equation :
[tex]18x - 15y = 36 \\ 15y = 18x - 36 \\ y = \frac{18}{15} x - \frac{12}{5} [/tex]
