3. welshfella

you need 2 values of x to get average change

4. Michele_Laino

Hint: here we have to apply this formula: $\Large rate = \frac{{f\left( {{x_2}} \right) - f\left( {{x_1}} \right)}}{{{x_2} - {x_1}}}$

5. Michele_Laino

no, it is: $\Large rate = \frac{{f\left( {{x_2}} \right) - f\left( {{x_1}} \right)}}{{{x_2} - {x_1}}} = \frac{{6 \times 3 - 6 \times 0}}{{3 - 0}}$

@Michele_Laino ?

@freckles hii can you please check? they stopped responding

@welshfella can you please check this?

9. Michele_Laino

that's right! It is: rate = 6