Help anybody please what’s the answer

What term best describes a line ans a point that lie in the same plane

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)