Answer:

The vertex form for a parabola is given by this expression:

By direct comparison we see that for this case:

And we know from the general expression that the vertex is:

So then the vertex for this case is:

Step-by-step explanation:
For this case we have the following function:

And we need to take in count that the vertex form for a parabola is given by this expression:

By direct comparison we see that for this case:

And we know from the general expression that the vertex is:

So then the vertex for this case is:

Choice b would be correct since the slope of the line is negative !
she could buy 2 pants and 2 shirts because 2 pants =$40 and 2 shirts=$20 so 40 +20=60
(6;2)
6 - x coordinate, 2 - y coordinate.
6 > 0, then we need to move right 6 points. 2 > 0, than we need to move up 2 points
Answer: Start at the origin. Move 6 units to the right, then move 2 units up.
Is there any other information behind this problem?