Khan Academy

Supporting grades: 7

Description: Sal identifies the constant of proportionality from table Find the constant of proportionality, r, in the equation y is equal to r times x. All right so we wanna find the constant, the constant of proportionality, I sometimes have trouble saying that, r, where if I for any x, if I multiply it by r I get y. Well we just have to look at each of these x's and figure out well what are we multiplying by to get to y.

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