Explain how you could use the construction tool or a compass and straightedge to create a line segment that is twice as long as ("ab" ) ̅.

answer:

the construction has the following steps,

step 1:   adjust the compass according to the length of the segment ab,

step 2: make a line that seems greater than the twice of the segment ab in length,

step 3 : make an arc from end of the line on the line,

step 4 : from the intersection of the arc and the line make another arc on the line.

thus, we get a line segment from the end point of the line to the final arc on the line which is doubled to the line segment ab.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.