Statements Reasons given 2. m = d-b C-0 C mp = 0-a _ _a 3. distance from (0, b) to (0, a) equals the distance from (c, d) to (c, 0) | definition of parallel lines 4. d - 0 =b-a application of the distance formula 5. m,= (b-a)-b substitution property of equality C 6. m,= inverse property of addition 7. m, = ms substitution property of equality The table shows the proof of the relationship between the slopes of two parallel lines. What is the missing reason for step 2? hs O A. Pythagorean theorem O B. application of the slope formula O C. transitive property O D. application of the distance formula