Which regression equation best fits these data ?

C.

Step-by-step explanation:

The best fit curve for the given set of points is the quadratic form, which is defined by:

(1)

Where:

- Independent variable.

- Dependent variable.

, , - Coefficient.

The coefficient associated with the second-power component determines whether vertex is an absolute maximum or not. The vertex is an absolute maximum if and only if , otherwise it is an absolute minimum. From image we notice that resulting fit curve will have an absolute maximum, then . Hence, the correct answer is C.

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: