Hello!
To find the equation for a line that passes through the point (6, -9) and is also parallel to the x-axis, we need to know the equation the x-axis.
The equation of the x-axis is written as y = 0. To find the equation of the line that passes through the given point, we need to use the y-value of the given ordered pair, in which, it is -9.
Therefore, the equation for the line that passes through the point (6, - 9), and is also parallel to the x-axis is y= -9.