A professor believes that students who smoke cigarettes tend to have lower grades. He collects data from 1326 randomly selected students at his university and discovers that, on average, students who smoke cigarettes do indeed tend to have lower grade point averages than students who do not smoke. Does this study give strong evidence that smoking cigarettes causes lower grades?

No.

Step-by-step explanation:

His finding that "students who smoke cigarettes do indeed tend to have lower grade point averages than students who do not smoke" implies that there can be a connection between smoking and grades. It does not specifically refer to a causal relation that smoking causes lower grades. People who make bad decisions may choose not to study well and may choose to smoke.

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.