Which of the following situations involves an average rate of change? a) A child grew 2 cm in three years. Ob) The temperature dropped 4C at 6:00 p.m. O c) The noise level is increasing by 20 dB as she walks into the arena. O d) A car was driven for 1 h.Determine the equation of the line tangent to the function f(x) = -3x* + 12x +9 at the point x - 3. O a) none of the above Ob) y- 18x + 36 Och y- 3x + 18 O d) y= - 6x + 36Determine the instantaneous rate of change of the function f(x)=x3 -2x2 +5x-5 at x=7. Round to two decimal places and enter only the numerical value. Your Answer: AnswerSelect all that are true about the function with the graph shown below: C] The instantaneous rate of change at x= O is O. C] The instantaneous rate of change is 0 for only two distinct values of x. D The tangent at x=1 has a slope greater than 1. O Theayerage rate of change in the interval-7771579 1 is positive