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# Proportionality - Proportional Relationships

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(4)  Proportionality. The student applies mathematical process standards to represent and solve problems involving proportional relationships. The student is expected to:

(A)  represent constant rates of change in mathematical and real-world problems given pictorial, tabular, verbal, numeric, graphical, and algebraic representations, including d = rt;

(B)  calculate unit rates from rates in mathematical and real-world problems;

(C)  determine the constant of proportionality (k = y/x) within mathematical and real-world problems;

(D)  solve problems involving ratios, rates, and percents, including multi-step problems involving percent increase and percent decrease, and financial literacy problems; and

(E)  convert between measurement systems, including the use of proportions and the use of unit rates.