Can someone everything's in the picture.

(a) Each input has only 1 output, making it a function.

(b) If any of the inputs had multiple outputs, it would not be a function. For example, if Input: 4 Output: 9 was on the table, it would no longer be a function since there is already a different output value for 4.

(c) y = 2x - 1... This equation works since 2(3) - 1 = 5, 2(4) - 1 = 7, 2(6) - 1 = 12, and 2(11) - 1 = 22

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.