Use a system of linear equations to find the quadratic function
f(x) = ax2 + bx + c
that satisfies the given conditions. solve the system using matrices.
f(−2) = −11, f(1) = −5, f(2) = −23

Step-by-step explanation:

Let be the quadratic function.

implies that

Similarly,

and

From equation 2,

Put (4) into (1) to get:

Put (4) in (3) to get:

Subtract (6) from (5) to get:

Put b=-3 in (4) to get:

a=--3-5=-2

Put b=-3 in to (6) to get:

-2(-3)+c=-3

6+c=-3

c=-6+-3=-9

Therefore the required equation is

dalila is incorrect. the whisker on the left is very long, going all the way out to 5. the whisker goes from 5 to 30, so it has a spread of 25. the rest of the box plot values are closer together, so 5 is an outlier