Pls help this is due today (this is the 2nd part to the last one)

How can you tell when x and y are not directly proportional?

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.

7x^2-9x+5=0 find the discriminant and number of real solutions