ilovemattc
Mar 19, 2009, 06:33 PM
(y+3)^2=-1(x+1) , list vertex, focus, directrix.. I know the formulas I just don't understand how to graph it and find the directrix to these kinds
Perito
Mar 19, 2009, 08:15 PM
Do you know how to find the vertex, focus, directrix, etc? That's where to start.
Alternately, you simply pick a value for x and calculate y, then plot one point. Continue doing that until the graph is finished. That's probably not what your teacher wants you to do, however.
Put the equation into a form where you can recognize the vertex, focux, etc. Then extract those parts of the formula and graph from that.
galactus
Mar 20, 2009, 10:55 AM
Use this as a guideline:
https://www.askmehelpdesk.com/math-sciences/graph-parabola-330673.html
If you get stuck, let us know. Just solve your equation for y and then graph it.