Question

What is the value of the dependent variable if the value of the independent variable is –4?

f(x)= -3x^2 + 5x
A.
28
B.
–44
C.
–68
D.
4

Answer 1

If you would like to know the value of the dependent variable if the value of the independent variable is - 4, you can calculate this using the following steps:

independent variable ... - 4 ... x
dependent variable ... f(x)

f(x)= -3x^2 + 5x
f(-4) = -3 * (-4)^2 + 5 * (-4) = -3 * 16 - 20 = -48 - 20 = - 68

The correct result would be C. –68.