a line across
a line graph looks like a stocks chart
x
the line would look like a perfectly diagonal line. the line would be 45 degrees.
two lines that cross
a straight line
A curved line is a line that is curved.
A linear line is a straight line
a line across
If the line has ends, then it's a line segment.
The plumb line is a vertical straight line.
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a line
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a line graph looks like a stocks chart
It looks like this////