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October 20, 2014

October 20, 2014

Posted by **Tommy W** on Sunday, December 12, 2010 at 5:12pm.

First question? 8x-4

Find the equation of the line that is perpendicular to 2x-y=3, and passes through the point (-4,1)

The answer is -1/2x-1 ///how do you work it out to get the answer???

- Math -
**Reiny**, Sunday, December 12, 2010 at 5:26pm8x - 4

= 4(2x-1)

2nd question:

slope of given line is 2, so the slope of the new line is -1/2

new equation:

y = mx + b

1 = (-1/2)(-4) + b

1 = 2 + b

b = -1

so y = (-1/2)x -1 is the new equation.

(if their answer was -1/2x-1, then they used quite improper mathematical form)

Furthermore, I am curious.

Since you did not know how to factor such a fundamentally easy common factor question as your first question, how can you possibly handle the second type of question ?

- Math -
**Tommy W**, Sunday, December 12, 2010 at 7:27pmThanks, Oh o.k.

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