the rate of change on the line.
That it descends.
If the line slants up and to the right, it has a positive slope. If it is slanting up and to the left, it has a negative slope.
Its angle of incline.
velocity
It is a horizontal line.
A slope is 0 if it is a straight horizontal line. A slope is undefined if it is a straight vertical line.
the rate of change on the line.
it is impossible to tell the slope of a line graph without proper points to evaluate from.
That it descends.
If you dont have slope then you cant tell
If the line slants up and to the right, it has a positive slope. If it is slanting up and to the left, it has a negative slope.
Its angle of incline.
The slope will tell you how much change of Y to X >.
velocity
The slope (rise over run) of one line will be a number (n) or (-n) and the perpendicular line's slope will be the exact opposite. So, for instance, if one line has a slope of 2/3, then a perpendicular line's slope must be -2/3, and vice versa.
The gradient of a line is the same as the slope of a line. It will tell someone measuring the line how straight the line is.