Can someone explain i’m confused on how to do this my teacher can’t teach me this has no time

1)

The factors of 9 are: 1, 3, 9

The factors of 15 are: 1, 3, 5, 15

Then the greatest common factor is 3.

2)

The factors of 16 are: 1, 2, 4, 8, 16

The factors of 28 are: 1, 2, 4, 7, 14, 28

Then the greatest common factor is 4.

3)

The factors of 50 are: 1, 2, 5, 10, 25, 50

The factors of 75 are: 1, 3, 5, 15, 25, 75

Then the greatest common factor is 25.

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

step-by-step explanation: