Plzz answer question( b) it is urgent

Speed = 16 km per hour

Speed = meter per second

Step-by-step explanation:

b). Total distance covered to and fro = 12 + 12

                                                        = 24 km  

    Total time taken to cover this distance = 1.5 hours

    Since, speed =

                           =

                           = 16 km per hour

     Since, 1 km = 1000 m

     And 1 hour = 3600 seconds

     16 = 16 × meter per second

                 =

                 =

                 = meter per second

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it