# Thread: graph functions

1. ## graph functions

ok, so i desperately need help on my final and i have lots of questions..

1. write an equation of the line perpendicular to the graph of x=3 and passing through D(4,-1)

2. the graph of the equation y=x^2 -3 is symmetric with respect to which of the following?
a. x axis
b. y axis
c. the origin
d. none of these

3. the graph of an odd function is symmetric with respect to which of the following?
a. x axis
b. y axis
c. the origin
d. none of these

4. given the parent function p(x)=spuare root of x, what transformation occurs in the graph of p(x)= (square root of x+2) - 5
a. right 2 units, up 5
b. up 2, right 5
c. left 2, down 5
d. down 2, left 5

2. All of this questions are common sense.

Question#1
Read the definition of a perpendicular line
Read about the slope of a line
Learn the point- slope formula

Question #2
Graph it in you calculator and you will see if it symmetrical, if it is reflected across the x or y axis. Just look at the table of x and y values.

Question #3
The graph of an odd function has rotational symmetry with respect to the origin.

Question #4
Compare the graphs and you will see the difference between $\displaystyle \sqrt{x}$ and $\displaystyle \sqrt{x+2} -5$