Clarify math equations

Writing slope-intercept equations (article)

Step 1. Calculate the slope from 2 points . slope y 2 − y 1 x 2 − x 1 11 − 7 5 − 3 4 2 = 2. Step 2. Substitute the slope for 'm' in the slope intercept form of the equation . y = m x + b y = 2 x + b.

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Equation of a line given two points

Step 1 Substitute slope for 'm' in y = mx + b. y = m x + b y = 2 x + b Step 2 Substitute the point ( 1, 3) into equation. y = 2 x + b 3 = 2 ( 1) + b Step 3 Solve for b. 3 = 2 + b 3 − 2 = 1 = b Step 4 Now that we know b, all that we have to do is