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find the average rate of change of $f(x)=-2x^{2}-5x + 7$ over the inter…

Question

find the average rate of change of $f(x)=-2x^{2}-5x + 7$ over the interval $-5,5$. average rate of change = select choice -5 -50 -18 -68

Explanation:

Step1: Calcular \( f(-5) \)

Sustituir \( x = -5 \) en \( f(x) = -2x^{2}-5x + 7 \):

$$ LATEXBLOCK0 $$

Step2: Calcular \( f(5) \)

Sustituir \( x = 5 \) en \( f(x) = -2x^{2}-5x + 7 \):

$$ LATEXBLOCK1 $$

Step3: Aplicar la fórmula del cambio promedio

La fórmula del cambio promedio de una función \( y = f(x) \) en el intervalo \([a,b]\) es \( \frac{f(b)-f(a)}{b - a} \). Aquí \( a=-5 \), \( b = 5 \), \( f(a)=-18 \), \( f(b)=-68 \):

$$ LATEXBLOCK2 $$

Answer:

-5