HELP Use quadratic regression to find the
equation for the parabola going
through these 3 points.
(2, 19) (6, 99) (-1, 1)

The equation for the parabola is .

Step-by-step explanation:

Let be , and and quadratic regression is represented by a second-order polynomial of the form:

(1)

Where:

- Independent variable

- Dependent variable

, , - Coefficients

Algebraically speaking, we need three distinct points on plane to determine the quadratic regression. By using all information, we form the following system of linear equations:

(2)

(3)

(4)

The solution of this system is: , , . Hence, the equation for the parabola is .

answer is more than one

step-by-step explanation:

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is: