What is the constant of variation, k, of the direct variation, y = kx, through (5, 8)? k = – k equals negative startfraction 8 over 5 endfraction. k = – k equals negative startfraction 5 over 8 endfraction. k = k equals startfraction 5 over 8 endfraction. k = k equals startfraction 8 over 5 endfraction.

The value of constant of variation "k" is

Solution:

Given that the direct variation is:

y = kx ----- eqn 1

Where "k" is the constant of variation

Given that the point is (5, 8)

To find the value of "k" , substitute (x, y) = (5, 8) in eqn 1

Thus the value of constant of variation "k" is

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

the correct option is b

step-by-step explanation: