solve for y. -2x+3y=9

whats the parallel line equation?

whats the perpendicular line?

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- Dec 16th 2008, 01:14 PMb.gilmoresolve for y. plz help me!!
solve for y. -2x+3y=9

whats the parallel line equation?

whats the perpendicular line? - Dec 16th 2008, 05:38 PMmr fantastic
$\displaystyle 3y = 9 + 2x \Rightarrow y = \frac{9 + 2x}{3}$.

Once you have solved for y, gradient = coefficient of x.

Parallel lines have the same gradient.

The product of the gradients of a pair of perpendicular lines is equal to -1.

Without further data, the best you can do is express the equation of each required line in the form y = mx + c where m is the gradient (which you can calculate) and c is the y-intercept (for which there is not enough data to get a value of).