Answer:
y = -½x + 7
Step-by-step explanation:
Perpendicular lines have the product of their gradients equal to -1
For this to be true, since the first gradient is 2, the second gradient must be -½
So the first part is
y = -½x + c
We substitute our point to get c
5 = -½(4) + c
7 = c
Our line is
y = -½x + 7
FYI slope-intercept form is y = mx + c
