Wo cars start moving from the same point. One travels south at 60 mi/h and the other travels west at 25 mi/h. At what rate is the distance between the cars increasing three hours later?

Explanation:

let distance between two  cars  is = z  mi

we have to find  =

One travels south at  = 60 mi/h  =   (given)

the other travels west at =25 mi/h.=  (given)

since both car have constant speed

at t = 3 hrs

x = 3× 60  = 180 mi/h

y = 3 × 25  = 75 mi/h

from the figure (i)  we get

...............(i)

put x and y values

we get

differentiate the equation (i) w r to t

put each values

  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.

pretty sure it's false