Answer
$$ y=-\frac{1}{10}x+2.4$$
Work Step by Step
We first find the slope:
$$ m=\frac{2-3}{4-\left(-6\right)}\\ m=-\frac{1}{10}$$
Thus, we see that between -6 and 0, the line goes down .6 units. Thus, the y-intercept is 2.4.
We know that $y=mx+b$, where m is the slope and b is the y-intercept. Using this, we find that the equation in slope intercept form is:
$$ y=-\frac{1}{10}x+2.4$$