Over which interval(s) is the function decreasing?

x ≤ -½

Step-by-step explanation:

symetry axis => x = (-4+3)/2

x = -1/2

so, the function decreasing over interval x≤ -½

Probability will be 0.5275

Step-by-step explanation:

We have given that there are a survey of 400 high school students

So sample space = 400

It is given that 211 students play organized sport

So favorable outcome = 211

We have to find the probability of high school students play organized sport

We know that probability is given by

So the probability will be 0.5275