This is a slope-intercept equation. The line of this equation is:
y = -2x + 6
The format for writing a slope-intercept form equation is y = mx + b, with m being the slope, x being the x-value, and b being the initial value (also known as y-intercept). In this equation, our slope is -2/1, our x value is unknown, and our initial value is 6 (or (0,6) because that is the point at which we start on the y-axis).