Chapter+4


 * Read each statement
 * Decide whether you Agree (A) or Disagree (D) with the statement
 * Write A or D in the first column OR if you are not sure whether you agree or disagree, write NS (Note Sure).

**A, D, or NS** ||  **Statement**  ||  **Step 2** **A or D** || because they have a constant ratio. ||  ||
 * **Step 1**
 * A || 1. A ratio is a comparison of two numbers by division. ||  ||
 * NS || 2. $3 per 2 pounds is an example of a unit rate. ||  ||
 * D || 3. The quantities [[image:webkit-fake-url://A99EC500-017B-4626-AFB6-F27221645C5C/pastedGraphic.pdf caption="pastedGraphic.pdf"]] are said to be proportional
 * A || 4. If the cross products of two ratios are not equal, then they do not form a proportion. ||  ||
 * A || 5. Polygons with the same shape and size are called similar polygons. ||  ||
 * D || 6. Corresponding angles of similar polygons are congruent. ||  ||
 * NS || 7. A model car could have a scale factor of 1 inch/1 foot. ||  ||
 * A || 8. A negative rate of change means the change is not a favorable one. ||  ||
 * D || 9. A line with a slope of 0 is a vertical line. ||  ||