## SAT notes

Knewton SAT Knotes: Math SAT STRATEGIES ALGEBRA Translation: ? ?of? means multiply ? ?per? means divide ? ?sum? is result of adding numbers ? ?difference? is result of subtracting numbers ? ?product? is result of multiplying numbers ? ?quotient? is result of dividing numbers Parabolas: For y = ax2 + bx + c ? a determines open up (a > 0) or open down (a < 0) ? c determines y-intercept Transformations: If y = f(x): ? y = f(x) + h shifts graph up for positive h, down for negative h ? y = f(x + h) shifts graph left for positive h, right for negative h ? y = f(ax) narrows graph for a > 1, widens graph for a < 1 ? y = af(x) stretches vertically for a > 1, squishes for a < 1 Inequalities: If you multiply or divide an