The value of a function

If f(x) = x² − 2x + 3, then f(1) equals:

If f(x) = x² − 2x + 3, then f(−1) equals:

If f(x) = x + 1, then f(4) equals:

If f(x) = 2x² − 1, then f(2) equals:

If f(x) = x², then f(½) equals:

If f(x) = 1 − 2x, then f(−2) equals:

Consider the piecewise function f(x) = { 2x² − 1 if x ≥ 1 ; x² if −1 ≤ x < 1 ; 1 − 2x if x < −1 }. What is f(3)?

For the same piecewise function f(x) = { 2x² − 1 if x ≥ 1 ; x² if −1 ≤ x < 1 ; 1 − 2x if x < −1 }, what is f(1)?

For the same piecewise function f(x), what is f(−1)?

For the same piecewise function f(x), what is f(−2)?

If f(x) = x² − 2x + 3, then f(0) equals:

If f(x) = (x + 2)(x − 1), then f(1) equals:

Which statement is correct about evaluating a function?

If f(x) = |x|, then f(−5) equals:

If f(x) = 2x² − 2x + 1, then f(−1) equals: