6.4 - midline, amplitude, and period\nscore: 7.17/10 answered: 8/10\nquestion 10\nfor y = -2 cos(x) +…

6.4 - midline, amplitude, and period\nscore: 7.17/10 answered: 8/10\nquestion 10\nfor y = -2 cos(x) + 8,\nits amplitude is\nits midline is y =\nquestion help: worked example 1

6.4 - midline, amplitude, and period\nscore: 7.17/10 answered: 8/10\nquestion 10\nfor y = -2 cos(x) + 8,\nits amplitude is\nits midline is y =\nquestion help: worked example 1

Answer

Explanation:

Step1: Recall amplitude formula

For $y = A\cos(x)+k$, the amplitude is $|A|$. Here $A=-2$, so amplitude $= | - 2|$.

Step2: Calculate amplitude

$| - 2|=2$.

Step3: Recall mid - line formula

For $y = A\cos(x)+k$, the mid - line is $y = k$. Here $k = 8$.

Answer:

Amplitude: 2 Midline: $y = 8$