This equation is written in slope-intercept form just backwards. We can rewrite this equation as:
y = -1/4x - 3
Using what we know about this type of equation (y = mx + b) we know that:
m = slope
b = y-intercept
In this equation the slope and y-intercept are given.
The slope is -1/4 and the y-intercept is -3.
Hope This Helped! Good Luck!