Search found 3 matches

Return to advanced search

What's the difference between these two equations?  TOPIC_SOLVED

My textbook asks me to graph out two equations: x^2+y^2=25 and y=sqrt(-x^2+25) I think that algebraically these are identical. In the solutions, the text shows two different graphs. The text says that the first equation fails the vertical line test, because its graph is essentially a circle. However...
by lordofthefishes
on Mon Sep 02, 2013 11:08 pm
 
Forum: Beginning Algebra
Topic: What's the difference between these two equations?
Replies: 2
Views: 1478

Function Correspondence: (1, 8) is on the graph of y = f(x)  TOPIC_SOLVED

"The point (1,8) is on the graph y=f(x). Find the corresponding coordinates of this point on each of the following graphs: ... c) y= -2f(-x)-7." The textbook answer is (-1,9). I don't understand how they got this answer. The only way that that would make sense is if the corresponding y coo...
by lordofthefishes
on Sat Oct 19, 2013 3:47 pm
 
Forum: Intermediate Algebra
Topic: Function Correspondence: (1, 8) is on the graph of y = f(x)
Replies: 3
Views: 2138

Re: Function Correspondence: (1, 8) is on the graph of y = f  TOPIC_SOLVED

Thank you, but I'm still a little confused. Why "do I have to do -1 so -x = -(-1) = +1 = 1"? Shouldn't the x correspondence of y = f(x) be (1)/-1 = -1 according to the correspondence equation?
by lordofthefishes
on Sun Oct 20, 2013 3:54 pm
 
Forum: Intermediate Algebra
Topic: Function Correspondence: (1, 8) is on the graph of y = f(x)
Replies: 3
Views: 2138

Return to advanced search