10. The table shows the mass (m grams) of a wooden cube of edge length x cm. Edge length (x cm) Mass (m grams) (a) (b) 2 4 5 8 10 5.2 41.6 81.25 332.8 650 State whether or not m is directly proportional to x. State whether or not m is directly proportional to x³. (c) Write an equation connecting m and x. (d) Find the mass of a wooden cube of edge length 9 cm.​