How would the graph change if the numbers on the vertical axis started with 0 and increased in increments of 10?

The nature of graph will be straight line passing through origin.

Explanation:

Basic rules to draw graph is as flows:

If a graph is plotted in which the vertical axis changes by the number 10 with increase in horizontal axis. The graph has initial point at 0 in the origin then the nature of graph will be straight line passing through origin as shown in the figure.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia