HELP PLS The makers of a new app recorded the number of times the app was downloaded each day for the first year the app was available.

Select the correct methods they could use to describe the data.

To describe how the number of daily downloads varies, they could use the median value. To describe how the number of daily downloads varies, they could use the mean absolute deviation.
To describe how the number of daily downloads varies, they could use the maximum value. To summarize the number of daily downloads with a single number, they could use the mean value.
To summarize the number of daily downloads with a single number, they could use the interquartile range. To summarize the number of daily downloads with a single number, they could use the minimum value.

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'.

i'm sorry i don't know

step-by-step explanation: