Which of the following equation represents a line parallel to y axis

Which of the following equations represents a line parallel to x axis

Which of the following equations represents a line that is parallel to the line with equation y = -3x + 4 ?

Which of the following equations represents as wave travelling along Y-axis?

Which of the following equations represents as wave travelling along Y-axis?

Which of the following equations represents as wave travelling along Y-axis?

Which of the following equations represents a wave travelling along the y - axis?

Which of the following equations represent a transverse wave travelling along- y axis ?

Which of the following equations represent a transverse wave travelling along- y axis ?

State with reasons which of following are true or false : The equation x= k represents a line parallel to x - axis for all real values of k.