Use the diagram to answer the questions. Is line m parallel to line n? Explain.
No, the slopes are not equal.
Is line m perpendicular to line k? Explain.
✓ Yes, the slopes are negative reciprocals.

No, n is not parallel to m as the slopes are not equal;

Yes, m is perpendicular to k as slopes are negative reciprocals.

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.