For the first one, f(x) clearly has positive y values, while g(x) doesn't (from what I see). In addition, cos(x) has a range of [-1, 1] so 2cosx would have a range of [-2, 2] and 2cosx+1 would therefore have a range of [-3, 3]. In addition, the maximum of the graph shown is 3, so the answer would be f(x) and h(x)
For the second one, sin(x) (including any x value)has a range of [-1, 1] so 2sinx would have a range from [-2, 2] and the range for 2sinx-2 would be [-4, -2] with the minimum being -4. For g(x), squaring something makes it positive, meaning that the minimum of (x-3)^2 would be 0. 0-1 would be -1. For h(x), the lowest is clearly -6, and -6 is lower than both -1 and -4, mking h(x) the smallest
To find the mean you first add all the numbers together, in this case 68. Then you have to divide this by the number of scores you added, which is 5. So 68/5= 13.6
