First of all, we need to find the slope of the given line, writing it in the 
form and reading the 
coefficient:
So, the slope is 
If a line with slope 
is perpendicular to a line with slope , the following relationship holds:
So, the slope of our line must satisfy
So, we need the equation of a line with slope 1 and passing through (4,7). Given the slope and a point 
of a given line, its equation is given by
So, if you plug your values, you have
It would be D. because when the circle is filled in, it means "equal to"
The answer is c I would wait for other answers I'm not sure thats exactly right
Substitute the value of the variable into the equation and simplify.
There for your answer is 10
