For 50 points

use a graphing calculator to find the value of f(x) when x = −1 for the function
f(x) = −4x − 5/2 .
enter your answer as a decimal if needed.
f(−1) =

1.5 or 1 1/5

Just plug -1 into the equation as x:

-4 x -1 - 5/2

4 - 5/2

1.5

Why did you mark as college level maths tho. This is more like middle school

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490