Why is the addition or subtraction of k to the output of a function considered a translation?

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Which of the following parabolas opens down?