Can someone explain how you do this and not only give me the answer?

Which statement best describes the polynomial

Line gh passes through points (2, 5) and (6, 9). which equation represents line gh? y = x + 3 y = x – 3 y = 3x + 3 y = 3x – 3

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?