Slope is

Then you use the equation

Where b is the y-intercept. To find it, plug in x and y from one of the points. Say, point 1 (1,10):

You know m (from above) and now you can solve for b.
Rearrange terms:

And that will be the answer.
Make sense?
The first one can be proven by graphing the parallelogram and the diagonals.
The measure of angle 2 is 160 because it is a vertical angle to angle 1. The measure of angle 3 is 10 because the two other angles must each be 10 in order for the sum of all three angles to equal 180 for the triangles.
I have no idea for the third one however.
Hope this helps!
Answer:
Truw
Step-by-step explanation:
It is exceptional
Answer:
-5/6
Step-by-step explanation:
Whatever number is connected to the x is the slope. The reason why is
y=m+b. M is the slope and B is the y-intercept.