Answer:
Option c is correct.
Equation with slope of 7 is; 
Step-by-step explanation:
The Equation of line is in the form of :
.....[1]
where
m represents the slope of the line.
x represents the variable.
Given : The slope of a line is 7
m = 7
substitute the value of m =7 in [1];

Therefore, the equation of line which graphs to a line with a slope of 7 is, y =7x