To find the inverse of a function, switch the x and the y and then solve for the new y. Like this: 
. Subtract 5 from both sides to get 
and then multiply both sides by 3. 3(x - 5) = y. B is your choice.
Gia is running for school president. Her best friend designed a rectangular button that measures 2.5 inches by 2 inches. Gina li
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Given:
The equation of given line is
A line is perpendicular to the given line and passes through the point (9,5).
To find:
The equation of the perpendicular line.
Solution:
We have,
On comparing this equation with slope intercept form , we get
It means, the slope of the given line is 3.
The product of slopes of two perpendicular lines is -1.
Point slope form of a line is
Where, m is the slope.
The slope of perpendicular line is and it passes through the point (9,5). So the equation of the line is
Adding 5 on both sides, we get
Therefore, the equation of required line is .