#$&*
Mth 158
Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Question Form_labelMessages **
** **
** **
for the question y^2 + y = -8 sqrt (x)+7 I'm not sure how to work it out
** **
@&
That question asks you to test for symmetry.
There are three types of symmetry to test for:
Symmetry with respect to the y axis is tested by substituting -x for x and seeing if the equation changes.
Symmetry with respect to the x axis is tested by substituting -y for y and seeing if the equation changes.
Symmetry with respect to the origin is tested by substituting -x for x and -y for y and seeing if anything changes.
Check out the videos at the links I just sent everyone. This problem is worked out in detail, according to the above plan.
*@
#$&*
Mth- 158
Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Question Form_labelMessages **
** **
** **
How would you graph the function f(x)= 12/13 * x^2
@&
You would start with the function y = x^2, with its basic points (-1, 1), (0, 0) and (1, 1).
Multiplying the values x^2 by 12/13 moves all point a bit closer to the x axis. The points (-1, 1) and (1, 1) become (-1, 12/13) and (1, 12/13). The point (0, 0) remains (0, 0), since 12/13 * 0 = 0.
The resulting graph is a parabola, just as the graph of y = x^2 is a parabola, but it's a little fatter, with all points a bit closer to the x axis.
*@