Posted by **joy** on Friday, February 8, 2013 at 10:23pm.

Find an equation of the line (in slope-intercept form) that passes through the point (7,5) and is perpendicular to the line 7x + 10y - 17 = 0

y=?

- math -
**Zac**, Saturday, February 9, 2013 at 12:05am
First put the perpendicular line equation into y=mx+b form. Your first step should be to subtract the 10y from both sides.

Then using the y = mx + b equation, you know the slope of the parallel line. Your line is perpendicular to the m value in the new equation. To find the slope use: -1/m. That number will be your m value in your equation.

Finally plug your numbers into the basic starter equation:

y-(yval)=m(x-(xval))

your yval and xval numbers are from the point the line passes through

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