The line contains the point (0.-3) and is perpendicular to a line that has slope 2. What is the equation of the line

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Answer:

Step-by-step explanation:

The slope of a perpendicular line, to one that has slope of 2, is the negative inverse of the reference slope.  The negative inverse of 2 is -(1/2).  The perpendicur line will have the form y = -(1/2)x + b, where b is the y-intercept.  Any value of b will produce a perpendicular line to one that has slope of 2, but this line needs to go through point (0,-3).  To find the value of b that would make this happen, just use that point in the equation y = -(1/2)x + b and solve for b:

y = -(1/2)x + b

-3 = -(1/2)*(0) + b

b = -3

The equation becomes y = -(1/2)x - 3

I graphed this versus a line with slope 2 and y-intercept of 2:  y=2x+2

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