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What is the average rate of change of f(x)𝑓(𝑥) from x1=−2𝑥1=−2 to x2=3𝑥2=3? Please write your answer as an integer or simplified fraction.f(x)=−4x+3

Question

What is the average rate of change of f(x)𝑓(𝑥) from x1=−2𝑥1=−2 to x2=3𝑥2=3? Please write your answer as an integer or simplified fraction.f(x)=−4x+3

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Solution

Para encontrar la tasa promedio de cambio de f(x) f(x) desde x1=2 x_1 = -2 hasta x2=3 x_2 = 3 , utilizamos la fórmula de la tasa promedio de cambio:

Tasa promedio de cambio=f(x2)f(x1)x2x1 \text{Tasa promedio de cambio} = \frac{f(x_2) - f(x_1)}{x_2 - x_1}

Primero, evaluamos f(x) f(x) en x1=2 x_1 = -2 :

f(2)=4(2)+3=8+3=11 f(-2) = -4(-2) + 3 = 8 + 3 = 11

Luego, evaluamos f(x) f(x) en x2=3 x_2 = 3 :

f(3)=4(3)+3=12+3=9 f(3) = -4(3) + 3 = -12 + 3 = -9

Ahora, sustituimos estos valores en la fórmula de la tasa promedio de cambio:

Tasa promedio de cambio=f(3)f(2)3(2)=9113(2)=9113+2=205=4 \text{Tasa promedio de cambio} = \frac{f(3) - f(-2)}{3 - (-2)} = \frac{-9 - 11}{3 - (-2)} = \frac{-9 - 11}{3 + 2} = \frac{-20}{5} = -4

Por lo tanto, la tasa promedio de cambio de f(x) f(x) desde x1=2 x_1 = -2 hasta x2=3 x_2 = 3 es 4 -4 .

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