Which explains whether or not the graph represents a direct variation? •The graph has a constant of variation of 3, so it represents a direct variation.
•The graph has a slope of 3, so it represents a direct variation
•The graph has a positive slope, so it does not represent a direct variation
•The graph does not beain at the origin so it does not represent a direct variation

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?