K+b=2，-k+b=-5。 When solving the equation, K = 7/2 and B =-3/2, so the slope of the straight line is 7/2.
The linear equation is y-2=7/2(x-3), and it is sorted by itself.
2. The slope of L1is (4-m)/(m+2)= L2-2, that is, (4-m)/(m+2)=-2, and the solution is m=-8.
3.( 1) The slope of the straight line perpendicular to x+3=0 is 0, and the slope of the intersection (3, -2) of the straight line with the slope of 0 is y=-2.
(2) The line perpendicular to y-2=0 is parallel to the y axis, so the line passing through (3, -2) and parallel to the y axis is x=3.
(3) If the slope is 1/2, the linear equation is y+2= 1/2(x-3), which is sorted by itself.
4. The slope of L is (-1- 1)/(-5-2)=2/7, and the linear equation is y-3=2/7(x-2). Sort it out by yourself.
5. The slope of straight line AB is (-5-3)/(- 1-5)=4/3, the slope of vertical line is -3/4, and the midpoint of straight line AB is ((5- 1)/2, (3-5)/2) = (2).
6. The slope of L 1 is (0-4)/(3-2)=-4, and the equation of L1is y=-4(x-3).
If L 1 is perpendicular to L2, the slope of L2 is 1/4, and the equation of L2 is y-4= 1/4(x-2), and it is sorted by itself.