Final answer:
To find the equation of a straight line parallel to the X-axis, we need to know the y-value of the line. Depending on the position of the line, the equations can be determined accordingly.
Step-by-step explanation:
To find the equation of a straight line parallel to the X-axis, we need to know the y-value of the line.
a) Since the line is 4 units above the X-axis, the equation of the line would be y = 4.
b) Similarly, if the line is 6 units above the X-axis, the equation would be y = 6.
c) If the line is 3 units below the X-axis, the equation would be y = -3.
d) Lastly, if the line is 5 units below the X-axis, the equation would be y = -5.