Question

Please help. Look at screenshot

Answer 1

Answer:

a. The function is increasing when $x>4$ and decreasing when $x$.

b. The function is greater than zero when $x$ and $x>5$

c. The function is less than zero when $3$

Step-by-step explanation:

a. The function $f(x)$ is increasing when it's instantaneous slope ( the slope of the line tangent to the graph ) is positive, and it is decreasing when the instantaneous slope is negative. We see from the graph of $f(x)$ that for $x>4$ the instantaneous slope is positive, and for $x$ the slope is negative.

b. From the graph we see that the function is greater the zero (has positive values ) when $x$ and$x>5$.

c. The graph of the function is less than zero ( is negative) when $3$