Question

I need the answer pls

Answer 1

Answer:

A

Step-by-step explanation:

To rite the equation of the function, take two points from the table. Let them be (1,21) and (3,15).

The slope of the function is

$\dfrac{21-15}{1-3}=\dfrac{6}{-2}=-3$

Thus, the equation of the function in slope-intercept form is

$f(n)=-3n+b$

Find b by substituting coordinates of the first point into the function expression:

$21=-3\cdot 1+b\\ \\b=21+3\\ \\b=24$

Therefore,

$f(n)=-3n+24$