When the voltage across the unknown device is increased from 6 V to 9 V, the resistance of the unknown device ___

The resistance remain the same.

Explanation:

The power will increases an from this process if the right resistor is not used it will get burnt.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.