The function f (x) = 5x+4f (x) = 5x+4 models the height of a tree, where x represents the years since the tree was planted for year 3 through year 10. What is the practical range of the function?

a.) all real numbers between 3 and 10 inclusive

b.) all integers

c.) all real numbers between 19 and 54 inclusive

d.) integers from 3 to 10 inclusive

Question

Mathematics

Tucker Chung

3 April, 03:17

The function f (x) = 5x+4f (x) = 5x+4 models the height of a tree, where x represents the years since the tree was planted for year 3 through year 10. What is the practical range of the function?

a.) all real numbers between 3 and 10 inclusive

b.) all integers

c.) all real numbers between 19 and 54 inclusive

d.) integers from 3 to 10 inclusive

+2

Answers (1)

Know the Answer?

Lukas Romero · Answer 1

"all real numbers between 3 and 10 inclusive" could not be the answer, because these are x-values (values of the independent variable).

" all real numbers between 19 and 54 inclusive" is the range. Why? Because in year 3, f (3) = height of tree = 5 (3) + 4 = 19 feet.

In year 10, f (10) = 5 (10) + 4 = 54 feet.