Hello Andrew;
First, let's state that straight line is represented by the standard form y = mx + b where 'm' is the slope.
Let's plug the values given in the problem to the form.
y = 11, x = -6, m = -5/12 we just do not know 'b' which is the y-intercept
11 = -5/12 x (-6) + b
11=5/2 + b
b = 11 - 2.5 = 9.5 = 19/2
Then the equation is ready
y = (-5/12)x + 19/12 or expanded bby 12
5x + 12y = 19