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On your math quiz, you earn
5 points for each question
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that you answer correctly.
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In the table above, q represents
the number of questions
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that you answer correctly
on your math quiz,
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and p represents the
total number of points
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that you score on your quiz.
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The relationship between
these two variables
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can be expressed by the
following equation--
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p is equal to 5q, where
p is the points you get
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and q is the number of questions
you answered correctly.
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And you could see
that in the table.
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If q is 0, if you got
no questions right,
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you get 0 points.
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If you got no questions
right, well, 5 times 0
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is going to be 0.
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If you get one question
right, well, 1 times 5 is 5.
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You get 5 points per question.
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Two questions right,
well, 2 times 5 is 10.
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3 times 5 is 15.
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So this all makes sense.
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So then they ask us, which
of the following statements
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are true?
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Check all that apply.
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So let's think about this.
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They say the
dependent variable is
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the number of points you score.
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So when you think about
what's happening here,
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is your number of
points you score
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is being driven by how many
questions you get right.
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It's not like somehow the
teacher says you got 15 points
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and now you have to get
exactly three questions right.
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It's the other way around.
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The number of
questions you get right
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is the independent
variable, and that's
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driving the number
of points you score.
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So the number of
points you score
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is the dependent variable.
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And typically, the convention is
to have the dependent variable
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be equal to some
expression involving
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the independent variable.
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And you see that
right over here.
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p is dependent on
what happens to q.
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Depending on the
number of questions,
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you multiply it by
5, and you get p.
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So the dependent variable is
the number of points you score.
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The dependent
variable is the number
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of questions you
answer correctly.
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No, we've already
talked about that.
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That's the independent variable.
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The independent variable is
the number of points you score.
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No, that's not right.
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That's the dependent variable.
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The independent
variable is a number
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of questions you
answer correctly.
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Well, that's right.
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That's what's driving
the dependent variable.
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And we can check our answer.