If it says "what is the equation of a slope of -3 and a y-intercept of -8"
Slope-intercept form: y = mx + b
("m" is the slope, "b" is the y-intercept or the y value when x = 0 --> (0, y) or the point where the line crosses through the y-axis]
Since you know:
m = -3
b = -8 Substitute/plug it into the equation
y = mx + b
y = -3x - 8
