SO (Algebra 1 STAAR STAT Key Practice)

What is the equation in slope-intercept form of the line that passes through points (-4, 47) and (2, -16)?

• y = -21/2x + 979/21

• y = -2/21x + 979/21

• y = -21/2x + 5

• y = -2/21x + 5

What is the slope of the line that passes through points (5, -11) and (-9, 17)?

• -2

• -1/2

• 7

• 2

The graph shows the linear relationship between the maximum area in square feet that can be painted and the number of gallons of paint used.

Which of these best represents the rate of change of the maximum area painted with respect to the number of gallons of paint used?

• 200

• 1/200

• 400

• 1/400

The table shows the linear relationship between the balance of a student's savings account and the number of weeks he has been saving.

Based on the table, what was the rate of change of the balance of the student's savings account in dollars and cents per week?

• 7

• 32

• 1

• None of the Above

What is another name for slope?

• Rate of Change

• y-intercept

• Initial Value

• All Real Numbers

The graph models the linear relationship between the temperature of the Earth's atmosphere and the altitude above sea level.

Which of these best represents the rate of change of the temperature with respect to altitude?

• -6.5

• -3.5

• -0.29

• -0.15

The table shows the heights and the lengths of several rectangles.

What does the correlation coefficient for the data indicate about the strength of the linear association between the height and length of these rectangles?

• Weak negative correlation

• Strong negative correlation

• Weak positive correlation

• Strong positive correlation

Describe the correlation coefficient -0.99.

CHECK ALL THAT APPLY!

• Strong

• Weak

• Positive

• Negative

Describe the correlation coefficient -0.13.

CHECK ALL THAT APPLY!

• Strong

• Weak

• Positive

• Negative

Describe the correlation coefficient 0.27.

CHECK ALL THAT APPLY!

• Strong

• Weak

• Positive

• Negative