Which formulas might be used to find the velocity based on a position-time graph? check all that apply.

y2 – y1
d/t
x2 – x1
y2 – y1/x2 – x1
? x/t

Out of the given options, the one with the correct formula for calculation of the velocity of a position time graph is:
(y2 - y1)/(x2 - x1)

In a position time graph, the displacement of an object is determined using the difference in the height of the graph, while the time taken for this displacement is given by the difference in the x-values, which represent time. The ratio of these changes is displacement divided by time, which is equivalent to velocity.

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.