Day 6 STAAR REVIEW IP

• less steep than
• less than
• more steep than
• greater than

2. The graph of the function 𝑓(𝑥) = 𝑥 is transformed to form function 𝑔𝑔(𝑥𝑥) such that 𝑔(𝑥) = 𝑓(𝑥) − 3.

Which graph represents f and g?

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• 
• 
• 

3.The graph of linear function h is shown on the grid. Given f(x) = x and h(x) = af(x) + 1, what is the value of a?

a=_______

• 
• 
• 
• 

5.A counselor asked college students who had jobs how many hours they worked each week.

The counselor then compared the number of hours each student worked and the student’s overall grade average.

Based on the correlation coefficient for the data, what type of linear association exists between hours worked and overall grade average?

• Strong negative

• Weak negative

• Weak positive

• Strong positive

6.The table shows the number of species added to the United States endangered species list each year for several years. Which correlation best describes the strength of the linear association between the number of species added to the United States endangered species list and the year? Choose TWO correct answers.

• r ≈ 0.985

• Strong positive correlation

• Week negative correlation

• Week positive correlation

• r ≈ 0.0985

7.Which situation best represents association but NOT causation?

• Joe has a gift card from Starbucks. The balance on the gift card decreases with every purchase he makes using the gift card.

• The teacher notices that students with longer last names score better on their math test.

• The more time a person spends exercising, the more calories that person burns.

• As the number of city projects increases, the amount of money spend by the city increases.

8.Which situation shows causation?

• When the number of students with cell phones increases, the number of students riding the bus decreases.

• The more toppings you choose to add to a pizza the higher the cost of the pizza will be.

• As the number of red cars driving in a town increases, the amount of speeding tickets increase in that town.

• When the number of people in a bus increases, the number of animals in a zoo also increases.

9.Find the linear equation and the correlation coefficient that represents the best fit of the given table.

• Equation: y = -1.5x + 3.5, Correlation Coefficient: r = -1

• Equation: y = 2x + 3, Correlation Coefficient: r = 0.8

• Equation: y = 0.5x - 1, Correlation Coefficient: r = 0.5

• Equation: y = -2x + 1, Correlation Coefficient: r = -0.9

10.Write the linear equation that best fits the given table. Find the correlation coefficient for this equation.

Equation:_____________

Correlation coefficient: _______________