(a)

Scatter diagram of the data:

$\"\"$

Comment: The relation appears to be cubic.

(b)

Find the cubic function of best fit $\"\"$ :

$\"\"$

The function is $\"\"$ .

(c)

Graph the function.

Graph of the cubic function $\"\"$ :

$\"\"$

(d)

Predict the cost of manufacturing $\"\"$ Cobalts:

Substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

The cost is $\"\"$ .

(e)

Find the $\"\"$ -intercept of $\"\"$ .

Substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ -intercept of the function is $\"\"$ .

The manufacturing cost is $\"\"$ when no cobalt is produced.

(a) Scatter diagram of the data:

$\"\"$

Comment: The relation appears to be cubic.

(b)The function is $\"\"$ .

(c) Graph of the cubic function $\"\"$ :

$\"\"$

(d) The cost is $\"\"$ .

(e) $\"\"$ -intercept is $\"\"$ .

The manufracturing cost is $\"\"$ when no cobalt is produced.