y = (1/2)x + 3
comparing to y = mx + c, slope , m = (1/2)
So if a line is parallel to another, the slopes are the same.
For the second line to be parallel, the slope would be =(1/2) and it passes through (4 , 8)
Using y = mx + c, x = 4, y = 8, m = (1/2)
8 = (1/2)*4 + c
8 = 2 + c
8 - 2 = c
6 = c
So the equation y = mx + c is y = (1/2)x + 6
Equation is y = (1/2)x + 6
Last option.
Hope this helps.