6.WHAT IS THE VALUE OF "x" IN THE QUADRATIC FUNCTION f (x) = 2x² + 8x + 7?
A.-2
B.2
C.1
D.-1
7.WHAT IS THE VALUE OF "h" IN THE QUADRATIC FUNCTION f (x) = 2x² + 8x + 7
A.1
B.-1
C.-2
D.2
8.WHAT IS THE VALUE OF "k" IN THE QUADRATIC FUNCTION f (x) = 2x² + 8x + 7
A.-1
B.2
C.8
D.-7
9.GIVE THE VERTEX OF QUADRATIC FUNCTION f (x) = 2x² + 8x + 7
A.(-2, -1)
B.(-1, -1)
C.(2, -1)
D.(1, 1)
10.WHAT IS THE LINE OF SYMMETRY OF QUADRATIC FUNCTION y = 1 - 4x - 2x²  ?
A.LS = -1
B.LS = 0
C.LS = -4
D.LS = -2​