For this case we have a function of the form:
[tex]y = f (x),[/tex] where:
[tex]f (x) = - 8-5x[/tex]
We want to know the value of the function when [tex]x = -4,[/tex] that is, [tex]f (-4).[/tex]
Substituting we have:
[tex]f (-4) = - 8-5 (-4)[/tex]
We have by law of multilplication of signs that:
[tex]- * - = +\\f (-4) = - 8 + 20[/tex]
Different signs are subtracted and the sign of the major is placed.
[tex]f (-4) = 12[/tex]
Answer:
Option A
