Answer:
x=-2
Step-by-step explanation:

Answer:
There is no slope. 
Step-by-step explanation:

(2, 2) and (4,2) makes a horizontal line. All horizontal lines on a graph have no slope.
X=-2; undefined slope means that the line is vertical, and the question states that the x-intercept was negative 2.
Answer: 9
Step-by-step explanation:
Because all sides of a square are equal. Regular polygons always have equal sides.