Illustrative Math - Algebra 2 - Unit 7 - Lesson 1 - Formative Library | Library

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Which of these statements describes a key distinction between an observational study and an experimental study?

Experimental studies are more representative of the larger population than observational studies.

Data is collected in experimental studies, but not in observational studies.

Observational studies try to answer a question, but experimental studies do not.

Experimental studies directly influence something to see its effect, but observational studies do not directly influence the subjects.

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4.

Match the description of the study design with the type of study being conducted.

		An experimental study
		A survey
		An observational study that is not a survey

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10.

Mai is using the quadratic formula to solve two different quadratic equations.
For the first equation, she writes x=\frac{=-4\pm \sqrt{4^{2}-4(4)(2)}}{2(4)}
For the second equation, she writes x=\frac{=3\pm \sqrt{(-3)^{2}-4(3)(5)}}{2(3)}
How many real solutions will each equation have? Explain how you know.

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11.

Here are graphs of two functions f and g.
Which statements are true about the graph of y=h(x) where h given by  h(x)=f(x)-g(x)? Select all that apply.

There is an x-intercept between x=1 and x=2

There is an x-intercept between x=2 and x=3

The y-intercept is positive

The y values are positive values when 0<x<1

The y values are negative values when 2<x<3

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This lesson is from Illustrative Mathematics. Algebra 1, Unit 7, Lesson 1. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/3/7/1/preparation.html ; accessed 29/July/2021.

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