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In triangle A=(0,4),B=(0,0),C=(4,2), which line is the altitude from A?

Ay=−2x+4
By=−x/2+4
Cy=2x+4
Dy=x/2+4
Answer & Solution
Correct answer: A. y=−2x+4
BC has slope 1/2, so the altitude through A has slope −2 and y-intercept 4.
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