The point-slope form:

We have the points
and
.
Substitute:

The standard form: Ax + By = C

No because it doesn't make sense <span />
Explanation:
using the parabola formula:
y = a(x-h)² + k²
vertex = (h, k)
We are given a parebola equation of: y = x²+9
comparing both equations to get the vertex:
y = y
a = 1
(x-h)² = x²
x² = (x + 0)²
(x-h)² = (x + 0)²
h = 0
+k = +9
k = 9
The vertex of the parabola as (x, y): (0, 9)
1. -3x + -6
2. -3x + 9
3. 2x - 6
4. -2x + 6
here u go
252, 210 divided by 5 = 42, 42 x 5 = 210 + 42= 252