In a direct variation, y = 18 when x = 3. Write a direct variation equation that shows the relationship between x and y.

You could do:
y • x =54
18•3 is 54 so that would make the equation true.

The answer would be b ! explanation: the formula for sa *surface area * is 2×l×w+2×l×h+2×w×h so in this case l=4w=12h=8so you use the formula to solve it and it give you the answer of 352^cm^2