Order 3/2, 5/8, 9/4, 1 & 7/8 from least to greatest

Given the following statements, which is the best

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2