Read the excerpt from "Flight into Yesterday." Amelia pushed both throttles forward. The plane moved slowly, heavy with fuel for the long ocean flight that lay ahead. At last it began to gather speed. It went fast and faster, hurtling toward the cliff. Almost at the very edge she felt it leave the ground. They were safely off, flying low over the ocean, but flying. Now she could concentrate on gaining altitude. She could start picking out the islands that would serve as landmarks for the early part of the flight.

How does this excerpt help develop the central idea of the passage?

It explains the process of flying the plane.
It describes the toll the trip took on her.
It demonstrates her role as a pioneer.
It shows why the trip was so risky.

d

step-by-step explanation:

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.