Y=a(x - 3)^2 - 1 what is the value of a?

How to find "a"???

Pick a point on the graph other than the vertex. Let's say you see the line pass through (1,5) and the vertex is at (3,4)...

First the vertex gives you this...

y = a (x - 3)2 + 4

Put the values (1,5) into this equation.

5 = a (1 - 3)2 + 4

Solve for a

5 = a*(-2)2 + 4
5 = 4a + 4
1 = 4a
1/4 = a

Final equation is

y = 1/4*(x - 3)2 + 4

You need to show the box plots

5(2a-5+b). xbox xboxxbx xb