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which system of equations does this graph represent?

linear graph and parabola. they intersect at negative 1, negative 5 and 2, negative 2

a. y = x2 − 6
y = −x − 4

b. y = x2 + 6
y = x + 4

c. y = x2 + 4
y = −x + 4

d. y = x2 − 6
y = x − 4