【Answer】: 1.C 2.D 3.y = -1/2x + 3
【Explanation】: 1. The statement "As one variable increases, the other variable decreases" describes a negative correlation or association. This is represented by option C.
2. Without the actual scatter plots, we can only make assumptions based on the given options. Option D states that "Only scatter plot A shows linear association." This implies that scatter plot B does not show a linear association, making it the correct answer.
3. The equation in slope-intercept form is given as \( y = mx + b \), where \( m \) is the slope and \( b \) is the y-intercept. The equation provided is \( y = -1/2x + 3 \), which means the line has a slope of -1/2 and a y-intercept of 3.
