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Pearson Algebra 1 Common Core, 2011 View details

2. Direct Variation

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Exercise 2 Page 304

What is the form of a direct variation equation?

y=10x

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Functions where y varies directly with x, direct variation equations, have a specific format. y= mxIn this form, m ≠ 0. By substituting the given values for x and y into the equation, we can determine the constant of variation, m.

y=mx

SubstituteII

x= 3, y= 30

30=m( 3)

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Solve for m

RearrangeEqn

Rearrange equation

m(3)=30

DivEqn

.LHS /3.=.RHS /3.

m=10