SOLUTION: Hello, need help graphing the following. 5x+8, if x if less than 0 2x^2-5. if x is greater than or equal to 0

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Hello, need help graphing the following. 5x+8, if x if less than 0 2x^2-5. if x is greater than or equal to 0      Log On


   

Question 363578: Hello,
need help graphing the following.
5x+8, if x if less than 0
2x^2-5. if x is greater than or equal to 0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Choose a range to graph (-5,5)
f%28-5%29=5%28-5%29%2B8=-25%2B8=-17
When approaching x=0 from the left,
f%280%29=5%280%29%2B8=8, use an open circle to signify a limit and not a point.
When approaching x=0 from the right,
f%280%29=2%280%29%5E2-5=-5, use a closed circle to signify a point.
f%285%29=2%285%29%5E2-5=50-5=45
Plot the points and connect the respective point with line/curve.