Multiply. (22 - 3)(32 + 2x-1)
A. GA – 5x -87 + 3x
OB. 6/4 + 5x2-87 + 3x
C. 5x4 - 5x2 - 7x2-3x
D. 6x4 - 5x2-82-3x

i'm not sure i quite understand, could you provide more information?

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

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'.