FreezeFrame, a social networking site, sent out a survey in which the users simply click a response to join the sample. One of the questions in 2015 was, "Do you prefer to shop online?" More than 45,000 people responded, with 79% responding yes. What can you conclude from the survey? a) About 79% of people planned to shop online in 2015.

b)The poll used a convenience sample, so the results tell us little about the population of all adults.

c)The poll used voluntary response, so the results tell us little about the population of all adults.

d)The sample is too small to draw any conclusions.

e)None of the previous answers is correct.

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'.

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