Ineed this quickly

jakita examines the ordered pairs ( 3/4, 2/3), (1/4, 2), (1, 1/2) and (1/2, 1), and determines the points form a direct variation with a k value of 1/2.

which statements about jakita's conclusion are true? select two options.
a.) the points actually represent an inverse variation.
b.) the k value of the direct variation is actually 2.
c.) the ordered pairs can be represented by the function y = x/2
d.) the ordered pairs can be represented by the function y = 1/2x
e.) as one quantity increases, the other also increases.