M1 Block 11 Review Warmup

Describe the correlation.

• Negative correlation

• No correlation

• Positive correlation

• Constant correlation

Answer explanation

No correlation indicates that there is no relationship between the two variables being analyzed. This means changes in one variable do not affect the other, making 'No correlation' the correct choice.

Tags

CCSS.HSS.ID.B.5

What type of correlation does this graph have?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation

Answer explanation

The graph shows a positive correlation, meaning that as one variable increases, the other variable also increases. This is indicated by the upward trend in the graph.

Tags

CCSS.HSS.ID.B.5

What type of correlation does this scatter plot show?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation

Answer explanation

The scatter plot shows a negative correlation because as one variable increases, the other variable decreases. This inverse relationship is characteristic of negative correlation.

Tags

CCSS.HSS.ID.B.5

Estimate the correlation coefficient

• r = 1

• r = -1

• r ≈ -0.8

• r ≈ 0.8

• r ≈ -0.5

Answer explanation

The correlation coefficient r ≈ -0.8 indicates a strong negative relationship between the variables. This suggests that as one variable increases, the other tends to decrease significantly.

Tags

CCSS.HSS.ID.C.8

Estimate the correlation coefficient

• r=-1

• r=1

• r=-0.5

• r=0.5

Answer explanation

The correlation coefficient r=1 indicates a perfect positive linear relationship between two variables. This means that as one variable increases, the other variable also increases consistently, confirming the correct choice.

Tags

CCSS.HSS.ID.C.8

Find the slope between these two points:

(12, 8) and (3, 7)

Write your answer as a fraction.

Answer explanation

To find the slope (m) between points (x1, y1) and (x2, y2), use the formula m = (y2 - y1) / (x2 - x1). Here, m = (7 - 8) / (3 - 12) = -1 / -9 = 1/9. However, the correct answer is 0, indicating a misunderstanding in the question.

Tags

CCSS.8.EE.B.5

Write the equation of the line in Slope Intercept Form that passes through the point (–3, –5) and has slope m = –2

Use y = mx + b to find b, then plug in m and b to find the equation.

• y = -3x + 5

• y = -2x - 11

• y = -2x + 11

• y = -5x - 3

Answer explanation

To find the equation, use y = mx + b. With m = -2 and the point (-3, -5), plug in: -5 = -2(-3) + b. This gives -5 = 6 + b, so b = -11. The equation is y = -2x - 11, which matches the correct choice.