parallel lines
A straight line.
It would be a ray (one half of a line).In geometry "A set of points extending infinitely in one direction" is called a RAY.
Only two are necessary to define a line. But infinitely many are required to DRAW it.
That would be an infinitely long line. Or just called a line if you are talking about graphs
diagonal
A line
a line
A line is a straight path that extends infinitely or endlessly in opposite directions. A straight path that joins two points is called a line segment.
Line
A line
A straight line.
A set of points that form a straight path extending indefinitely in opposite directions is called a line. In geometry, a line is defined by two points through which it passes and can be represented by a linear equation in a coordinate system. Unlike line segments, which have defined endpoints, a line continues infinitely without any boundaries.
A straight line with no end points such as the number line
It would be a ray (one half of a line).In geometry "A set of points extending infinitely in one direction" is called a RAY.
A straight line of infinite length!
An infinite number of points extending in opposite directions with only one dimension describes a line. In geometry, a line is defined as a straight, one-dimensional figure that has no thickness and extends infinitely in both directions. It is characterized by having length but no width or depth, making it purely one-dimensional. Each point on the line represents a unique location along its infinite length.
A line.