Tim and Jayne were discussing the following mock exam question. Here is some data about two groups of people listening to a radio station one day.
Percentage
Mean number of Range of number of
hours listening hours listening
23
1.4
4.3
77
6.5
13.8
Group Alpha
Group Beta
Compare the data for people in the Alpha group with people in the Beta group.
Make three comparisons.
Tim said he had struggled with the question.
Jayne said she had gained full marks by starting each comparison with,
Beta had a higher...
Try and work out the three comparisons she used.
Write them on separate lines.
+
Total marks: 3
O Maths Watch - GO

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

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'.

false

step-by-step explanation: