SOLUTION: h(x) = 1/x-3 +1 (Graphs of Rational Functions)

Algebra ->  Test -> SOLUTION: h(x) = 1/x-3 +1 (Graphs of Rational Functions)      Log On


   



Question 473541: h(x) = 1/x-3 +1 (Graphs of Rational Functions)
Answer by ccs2011(207) About Me  (Show Source):
You can put this solution on YOUR website!
To graph these types of equations, you need:
1) Vertical Asymptote (when is denominator 0)
2) Horizontal Asymptote (what is y when x gets very large)
3) Two points, one on either side of vertical asymptote
h%28x%29+=+1%2F%28x-3%29+%2B+1
Denominator is x-3: x-3 = 0 --> x=3
1) Vertical Asymptote is x = 3
Note: As the denominator of a fraction gets larger its value gets closer to zero
So when x is very large h(x) = 0 + 1 = 1
2) Horizontal Asymptote is y = 1
Pick an x_value less than 3 and greater than 3:
Say 2 and 4
h%282%29+=+1%2F%282-3%29+%2B+1+=+0
h%284%29+=+1%2F%284-3%29+%2B+1+=+2
3) Two points: (2,0) and (4,2)
Now you can sketch the graph of h(x):
Draw dotted lines for the asymptotes at x=3 and y=1
Plot the points found above
Draw a line through the points without crossing the dotted lines
You should notice you have to draw 2 lines, the lines should get really close to y=1 on either end at go almost vertical at x=3
graph%28200%2C200%2C-1%2C7%2C-10%2C10%2C1%2B%281%2F%28x-3%29%29%29