Evaluate the function f(x)=-3x+9 at the indicated values.
a). f(2)=_____ simplify your answer
b).f(-2)=_____ simplify your answer
Replace x with given number.
f ( 2 ) = - 3 * 2 + 9 = - 6 + 9 = 3
f ( - 2 ) = - 3 * ( - 2 ) + 9 = 6 + 9 = 15
To evaluate the function f(x)=-3x+9 at different values of x, we substitute the given values into the function and simplify the expression.
a) To find f(2), we substitute x=2 into the function:
f(2) = -3(2) + 9
Simplifying the expression:
f(2) = -6 + 9
f(2) = 3
Therefore, f(2) = 3.
b) To find f(-2), we substitute x=-2 into the function:
f(-2) = -3(-2) + 9
Simplifying the expression:
f(-2) = 6 + 9
f(-2) = 15
Therefore, f(-2) = 15.
So, f(2) = 3 and f(-2) = 15.