If a line is inclined to H.P., its plan will______.

In engineering graphics, the projection of a line on a plane is a point or a line, and it depends on the line's relationship with the plane: Perpendicular: The projection is a point, and the intersection point with the plane and its direction vector will be coincident with the normal vector N of the plane. Parallel: The line will be parallel with its projection onto the plane, and it will be orthogonal to the normal vector of the plane.  The projection of an object is the figure or view formed by joining the points at which the lines meet the plane in correct sequence. The lines or rays... Show more

In engineering graphics, the projection of a line on a plane is a point or a line, and it depends on the line's relationship with the plane:
Perpendicular: The projection is a point, and the intersection point with the plane and its direction vector will be coincident with the normal vector N of the plane.
Parallel: The line will be parallel with its projection onto the plane, and it will be orthogonal to the normal vector of the plane. 

The projection of an object is the figure or view formed by joining the points at which the lines meet the plane in correct sequence. The lines or rays drawn from the object to the plane are called projectors. The transparent plane on which the projections are drawn is known as the plane of projection. 

Here are some examples of projections in engineering graphics:
Isometric drawing
Orthographic or multiview drawings
Dimensioning
Sectioning
Drawing tools
Assembly drawings
Cross-sectional views
Half-sections 

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