It is one that may be summarized by a straight line.Select one:a.outliersb.scatter plotc.nonlinear relationshipd.linear trend

Break Down the Problem

1. Identify what the question is asking about a straight line in relation to data representation.
2. Determine the meaning of the provided options (a, b, c, d).

Relevant Concepts

1. Outliers: Data points that are significantly different from others in a dataset.
2. Scatter Plot: A graph used to display values for typically two variables for a set of data.
3. Nonlinear Relationship: A relationship between two variables that does not follow a straight line.
4. Linear Trend: A consistent, straight-line relationship between two variables in a dataset.

Analysis and Detail

1. The phrase "summarized by a straight line" indicates that the correct answer refers to a type of relationship that can be represented with a linear equation. This would exclude options regarding outliers, scatter plots, and nonlinear relationships.
2. A linear trend indicates a direct, proportional relationship, which is often the representation used in regression analysis where data points tend to cluster around a straight line.

Verify and Summarize

With the definitions and analyses considered, the option that best describes a relationship represented by a straight line is d. linear trend.

Final Answer

d. linear trend