Your school is having a book fair how many books were sold in the price range of $21 - $30?
A. 200
B. 50
C. 100
D. 150
*look at picture for the graph chart*

C. 100 books

Step-by-step explanation:

By looking at the blue bar on the graph for the price range of $21-30, we can see that it goes up to 100 and stops. This tells us that 100 books were sold for this price range.

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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step-by-step explanation:

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