Answer: 
C. point-slope form.
Step-by-step explanation:
To answer the question, let us go through each of the answer choices one by one. 
 A. standard form.
The standard form for a linear equation is 

which is not the form our equation is in; therefore, this is not a correct choice. 
B. slope-intercept form.
The slope-intercept form of an equation is 

which is not the form our equation is in; therefore, this is not a correct choice. 
C. point-slope form.
The point-slope form of a linear equation is 

and our equation is 

Therefor