The missing number is 6 because half of 18 is 9 and half of 12 is 6
The common endpoint of two Amy's is the vertex. So the answer is A
The equation of line perpendicular to given line is:

Step-by-step explanation:
Given equation is:

First of all, we have to find the slope of the given line
So,

Dividing both sides by 2

As the equation is in slope-intercept form, the co-efficient of x will be the slope of the line

As we know that product of slopes of two perpendicular lines is -1
Let m-2 be the slope of line perpendicular to given line

Slope-intercept form is:

putting the value of the slope

Putting the point (3,1) in the equation

Putting the value of b

Hence,
The equation of line perpendicular to given line is:

Keywords: Slope-intercept form, slope
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Just rewrite <span>y = ---- as y = (1/3)x. The unit rate is 1/3.
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