Domain (x-values)
Range (y-values)
Since they gave you the domain/x-values = -2, 1, 6, you can find the corresponding range/y-values by plugging in these values for "x" in the function:
x = -2
5x + y = 1 Substitute/plug in -2 into "x" to find the value of y
5(-2) + y = 1
-10 + y = 1 Add 10 on both sides to get "y" by itself
y = 11
x = 1
5x + y = 1 Plug in 1 into "x"
5(1) + y = 1 Subtract 5 on both sides
y = -4
x = 6
5x + y = 1
y = -29
Your answer is D
