Normal vision is called 20-20 vision. these numbers are actually a ratio—a comparison of the distance you can see to the distance a normal-sighted person can see. for example, a person with 20-30 vision can see from a distance of 20 feet what a person with 20-20 vision can see from a distance of 30 feet. based on this knowledge, explain what the following numbers mean regarding vision.
a. 20-100
b. 20-40

See below.

Step-by-step explanation:

a. A person with 20-100 vision can see  from a distance of 20 feet what a person with 20-20 vision can see from 100 feet.

b. If you have 20-40 vision you can see from 20 feet what a person with 20-20 vision can see from 40 feet.

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.