Subject: Graphing

Graph y = x² − 4

Plot a parabola and read off its zeros, vertex and y-intercept.

Answer 2 zeros, 1 extremum on [-5, 5]

Solution

Function f(x) = x^2 - 4
Range x ∈ [-5, 5]
Zeros x = -2, x = 2
y-intercept (0, -4)
Local extrema min at x = 0.025 (y = -3.99937)

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