The range of the function y = 3sin(x) is -3 <= y <= 3 because the function sin(x) varies between -1 and 1, which when multiplied by 3 gives a range from -3 to 3.
The range of the function y = 3sin(x) is given by -3 <= y <=3. This is because the sine function, sin(x), oscillates between -1 and 1 for all values of x. When you multiply this by 3, as in 3sin(x), the result will oscillate between -3 and 3.
This represents the highest and lowest values (antinodes) that the function 3sin(x) will yield, for any real number x, hence giving the range of the function y = 3sin(x).