1. DO = OB, AO = OC Vertical angles are equal.
2. DOC = AOB Given
3. Triangle COD congruent to Triangle AOB If two sides = and ||, then a
parallelogram.
4. 1 = 2, AB = DC If alternate interior angles =, then
lines parallel.
5. AB||DC CPCTE
6. ABCD is a parallelogram SAS

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

addition

step-by-step explanation: