Question 281372
You are right you shuld use y - y1 = m(x - x1) to find the line with slope 2 and passing through (3,9)

given m = 2 and x1 = 3, y1 = 9, replacing the values in equation we get

y - 9 = 2(x - 3)

y - 9 = 2x - 6

y = 2x + 3