**a.** Since x = -1, we use the function f(x) = x – 3.

∴ f(-1) = -1-3 = -4

**b.** Since x = 0, we use the function f(x) = 2x + 5.

∴ f(0) = 2×0 + 5 = 5

**c.** Since x = 1 > 0, we use the function f(x) = 2x + 5.

∴ f(1) = 2×1 + 5 = 2 + 5 = 7

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