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Algebra Simple Interest Formula Interest = principle × rate × time • I = prt read as “I am pretty ” Distance Formula Distance = rate × time • d = rt remember as dirt Linear Equations (Slope-Intercept Form) Begin, Move: the use of m and b in y = mx + b To graph such a line equation, begin at the value of b, then move according to the value (slope) of m. Multiplying Binomials Multiply the terms of two binomials in this order. For example (x- 2)(x + 1), FOIL: First, Outside, Inside, Last. Word-Problem Solving Strategy S-T-A-R Search the word problem. Translate the words into an equation. Answer the problem. Review the solution. Quadratic Formula A song to remember the quadratic formula sung to the tune of "Pop Goes the Weasel" x equals negative B Plus or minus square root of B squared minus four A C All over two A.