Question 241609
write the equation of the line. 
Through (8,-9), perpendicular to 7x + 9y = -25
-----
Find the slope, m, of the line by putting the eqn into slope-intercept form, 
y = mx + b
That means solve for y:
7x + 9y = -25
9y = -7x - 25
y = (-7/9)x - 25/9
The slope is -7/9
------------------
The slope of lines perpendicular is the negative inverse, +9/7.
Use y = mx + b again with the point to find b:
-9 = (9/7)*8 + b
b = -9 - 72/7
b = -135/7
--> y = (9/7)x - 135/7 slope-intercept form
or 9x - 7y = 135 Standard form
-----------------
question #2 is through (-6,-7) parallel to -2x + 7y=26
Do it the same way.
If you have questions, or to check your work, email me at
gsihoutx@aol.com