Which equation of the line that passes through the point (3, 5) and is perpendicular to the line x = 4?
a. y = 5
b. x = 5
c. y = 4
d. x = 3

X = 4 is a vertical line passing through x = 4. Any horizontal line, in which only the value of y is defined, will be perpendicular to this line.
The line must also pass through y = 5 to satisfy the ordered pair. Therefore, the answer is
A) y = 5

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