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anonymous
 one year ago
Find the equation of the line that is perpendicular to the graph of y=1/2x + 9 and passes through (8,5)
anonymous
 one year ago
Find the equation of the line that is perpendicular to the graph of y=1/2x + 9 and passes through (8,5)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hi  I can help you with this. First of all, can you tell me what the slope of your line is? \[y = \frac 12x + 9\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Good! Now, can you tell me what the slope of a *perpendicular* line would be?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would it be the reciprocal?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Close. The *negative reciprocal". For example, a line of slope 5 would have perpendicular slope 1/5. As a second example, a line of slope 1/3 would have slope 3. So ... what's the slope of your perpendicular line?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You need to "flip" AND change the sign ...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Good! So now, you want the line with slope 2 that passes through the point (8,5) . (If you've heard of pointslope form, that would be great to use right now! Or, you can certainly do it different ways...)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That's what I got, too! Awesome!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thank you!!! Really helped!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You're welcome! Have a great day...
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