How do i find velocity on a displacement vs. time graph?

Question

and turn a disp./time graph into a velocity/time graph?

I need to know how i use the slopes on the curves and onstraight lines ( going up or down)

Answer 1

I had tried few online tutoring website and found transwebtutors.com quite interesting,

you may try this one

Answer 2

if the segments on the disp vs time graph are straight lines, you merely measure the slope of those lines; the velocity is the slope of the line

so if the disp vs time graph shows a straight line of slope 3 between say t=0 and t=4, then you know the object had a constant speed of 3 units between t=0 and t=4;

if the disp vs time graph is curved, then you need to find the slope of the tangent line to the disp vs time curve at each point; the slope of this tangent line is the instantaneous speed at the time, and with several such measurements you can construct your v vs t graph