Unit 3

Front

What does an r value of r = -0.4 indicate about the correlation?

Back

Weak negative correlation.

Front

How do you find the x-intercept of the equation 2x + 2y = 4?

Back

Set y = 0 and solve for x: (2, 0).

Front

Convert the equation 2x + 5y = 20 to slope-intercept form.

Back

y = 4 - (2/5)x.

Front

What does an r value of r = 0.54 indicate about the correlation?

Back

Moderate positive correlation.

Front

What type of line is represented by the equation y = 1?

Back

Horizontal line.

Front

What is the slope of the line represented by the equation y = mx + b?

Back

The slope is m.

Front

What is the y-intercept in the equation y = 3x + 2?

Back

The y-intercept is 2.

Front

How do you determine if a correlation is strong or weak?

Back

By looking at the absolute value of the r value; closer to 1 is strong, closer to 0 is weak.

Front

What is the x-intercept of the equation 3x + 4y = 12?

Back

(4, 0).

Front

What does a positive slope indicate about a line?

Back

As x increases, y also increases.