Average Reviews:
(More customer reviews)This book does exactly what it says it will do, right up to chapter 11. For some reason, the author seemed to be in a hurry and deviated from the normal "step by step" approach used in previous chapters.
I understood everything from page 1 to the bottom of page 211. At the top of page 212 there are 5 practice questions that left me in the dark. No explanation as to what the author wants and the answers add to the confusion.
Here is an example of how easily it is to become confused.
The author walks you through graphing lines.
Page 211:
Draw the graph of 2x-y=8
Find the coordinates of two points on the line:
Let x= 1
2x-y=8
2(1)-y=8
2-y=8
2-2-y=8-2
-y=6
-y/-1 = 6/-1
y=6
(1,6)
I understand how to do this, and the author goes on to show how to graph 2x-y=8 when x=1 and x=5
Page 212:
Draw the graph of each of the following:
1.
2.
3.
4. 3x-y=6.
5.
Up until this point the author gives you the value of x for you to solve his examples and how this looks on a graph. Suddenly at practice time you are not given the value for x and you are suppose to graph a line. I am just learning how to work this type of problem. Am I suppose to substitute my own value for x? A little input would have been helpful here. The answers that are given, if I am to give my own value for x, my lines will be different than the lines the author shows? Is this right?
I cannot count how many times I had to go back and re-read previous pages in chapter 11 to try and read the authors mind.
I am now trying to take the chapter 11 quiz.
Question 6. The line whose equation is 2x+3y=6 is:
(a) line l
(b) line m
(c) line n
(d) line o
I have read and re-read this chapter and gone over the previous examples. I have tried to find an answer on the internet. Am I suppose to use my own substitute values for x? If so, wouldn't the line be different from the authors answer? I have no idea because I don't know what values the author used versus mine. I don't like to reverse engineer answers. As if you could reverse engineer lines on a graph.
I take a pre-college test in 10 days. I can only hope they do not ask me to choose the "line whose equation is x-2y=4".
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