The range is the output or the y values in the case of this function. The only y value on this function is 1 therefore the range is 1
To answer, change the 6 into a fraction
6 x 6/6 = 36/6
36/6 + 4/6 = 40/6
Simplify
40/6 = 6 4/6, or 6 2/3 (simplified)
hope this helps
Its 576 if you multiply 48 and 12 you get 576