I already adjusted the points to make two new figures just confused about the second part

Solve for x i'll try to attach the files bc it's not letting me for some reason

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible