Question

Which of the following is not an ordered pair from the function f(x) = 5x - 6?

Answer 1

We have been given a function $f(x) = 5x - 6$. We are asked to choose the point from given choices, which is not a solution of given function.

Let us check each given point one by one.

A. (3,9)

$f(x) = 5x - 6$

$9= 5(3)-6$

$9=15-6$

$9=9$

Since both sides of function are equal, therefore, point (3,9) is the solution of our given function.

B. $(1,-1)$

$f(x) = 5x - 6$

$-1= 5(1)-6$

$-1= 5-6$

$-1=-1$

Since both sides of function are equal, therefore, point $(1,-1)$ is the solution of our given function.

C. $(5,19)$

$f(x) = 5x - 6$

$19= 5(5)-6$

$19= 25-6$

$19=19$

Since both sides of function are equal, therefore, point $(5,19)$ is the solution of our given function.

D. $(4,10)$

$f(x) = 5x - 6$

$10= 5(4)-6$

$10= 20-6$

$10\neq 14$

Since both sides of function are not equal, therefore, point $(4,10)$ is not a solution of our given function and option D is the correct choice.