Equations of Proportional Relationships Quiz
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Which equation represelits a proportional relationship that has a constant of proportionality equal to 5?
оу
0 x-x-13
O x-x+ 1/3
o
O y= 5x

y=5x is the correct answer

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb