The vertex of the parabola is at the poiny (-2,-1) and the point (-1,1) is on the parabola, write the equation of the parabola

Question

anonymous · Answer

|dw:1389817505294:dw|

anonymous · Answer

helppppp

campbell_st · Answer

well the vertex form of a parabola can be written as

$$y = a(x -h)^2 + k$$

the vertex is (h, k)

so substitute your vertex 

when you've done that, substute the given point to find the value of a

campbell_st · Answer

when you have the correct information, distribute and collect like terms.

anonymous · Answer

i dont understand, how to do it all

campbell_st · Answer

ok... so your vertex is 

(-2, -1) 

which means h = -2 and k = -1

so substitute them into the standard form above.... 

what you it look like

you can use the draw option to show it.

anonymous · Answer

can you jus give me the answer please lol