7. For which discriminant is the graph possible?

A. b2 – 4ac = 0

B. b2 – 4ac = –1

C. b2 – 4ac = 4

C. b2 – 4ac = 4

Step-by-step explanation:

The graph is possible for  

Step-by-step explanation:

we know that

The discriminant of a quadratic equation of the form

is equal to

If D=0 the quadratic equation has only one real solution

If D>0 the quadratic equation has two real solutions

If D<0 the quadratic equation has no real solution (complex solutions)

In this problem , looking at the graph, the quadratic equation has two real solutions (the solutions are the x-intercepts)

so

therefore

The graph is possible for

b^2 – 4ac = 4

529 and 531

step-by-step explanation:

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right