Question

graph the function by hand. find the vertex
y=x^2+2x-7

Answer 1

For the first part of the question, you need to do it yourself.
First, make a table.
x |-4|-3| -2 | -1 | 0 | 1 | 2
---------------------
y | 1 |-4 |-7 | - 8 | -1 |-4| 1
Graph it using a graph paper then.
After that you can get the vertex.

Answer 2

The other way to get the vertex is to make the equation into the form y = a(x-h)^2+k, where (h,k) is the coordinates of the vertex.

Answer 3

when i plot the numbers it doesnt form a parabla

Answer 4

Sorry, for x=0, y =-7, typing mistake in my table.
Then you should get a parabola