What does the tangent at a point to the velocity-time graph represent?

What does the tangent at a point to the displacement-time graph represent?

Slope of a velocity-time graph gives

What does the slope of position-time graph represents?

What does slope of (v-t) graph represent?

What would be acceleration of a body if its velocity-time graph is line parallel to the time axis ?

Draw velocity-time graph for a body moving with uniform velocity. Hence show that the area under the velocity-time graph gives the distance travelled by the body in a given time interval.

What is the quantity which is measured by the area occupied below velocity -time graph ?