Is anyone good at math and can help with this, or at least the first one and explain how to do it?

now, bear in mind that all these ones are lines, and to graph a line all you need is two points, so let's pick a couple of random values for say "x" and let's see what we get for "y" and that's our x,y point.

3)

check the red line in the picture below.

4)

check the blue line in the picture below.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

6e14 is the answer.