How do i write out a function rule from a table? can somebody explain in detail, i am very confused.

First we need to set up a table, i'll make up some numbers.

y= 2,4,6,8

x=4,8,16,20

x is always over y.

the y values go up 2 each time, and the x values go up 4 each time.

so your format would be y=mx+b

your answer from my example would be y=2x+4.

also i forgot about the  your answer for that would be the number it counts up or down by each time, and our answer for this would be

I hope this helps!

where's the diagrams?

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^