Question

The point (3,-1) is on a graph of

y = x² + kx -4. What is the value
of k?
A -1
B -4/3
C -2
D-6

Answer 1

Step-by-step explanation: ( 3, 1)

x = 3, y = 1

From the formula, y = x² + kx - 4

1 = 3² + 3k - 4

1 = 9 + 3k - 4

1 = 5 + 3k

-3k = 5 + 1

-3k = 6

Divide both sides by -3

-3k/-3 = 6/ -3

k = -2

Answer 2

Your answer is going to be C because the value of -2 is not greater than c