First, let's get it into 'standard' form:
-6x + 2y = -18
Add 6x to both sides:
2y=6x-18
Divide both sides by 2
y=3x-9 Do you recognize this form? Remember y = mx + b ? This form is the equation of a LINE
No terms are 'squared'....In other words, no pieces of the equation have an EXPONENT, so it is NOT EXPONENTIAL .... Cool?