Question

describe in words how you would evaluate the function for f(-5). then state the value of f(-5).

f(x) = 4x - 1

Explanation:

Step1: Substitute x with -5

To evaluate \( f(-5) \) for the function \( f(x) = 4x - 1 \), we substitute \( x = -5 \) into the function. So we get \( f(-5)=4\times(-5)-1 \).

Step2: Perform the multiplication

First, calculate the multiplication part: \( 4\times(-5)= -20 \). Now the expression becomes \( f(-5)= -20 - 1 \).

Step3: Perform the subtraction

Then, subtract 1 from -20: \( -20-1=-21 \).

Answer:

To evaluate \( f(-5) \) for \( f(x) = 4x - 1 \), substitute \( x=-5 \) into the function, calculate \( 4\times(-5) \) to get -20, then subtract 1 from -20. The value of \( f(-5) \) is \(-21\).