Question

Use the cubic model y = 10x3 − 12x to estimate the value of y when x = 3.

Answer 1

To solve this problem you must apply the proccedure shown below:

1. You have the following function given in the problem above:

$y=10^{3}-12x$

2. To estimate the value of $y$ when $x=3$, you only need to substitute this value of $x$ into the function, as following:

$y=10^{3}-12x\\y=10(3)^{3}-12(3)\\y=10(27)-36\\y=270-36\\y=234$

Therefore, the answer is: A) 234