100

a numerical constant factor that multilplyes a variable in a mathmatical exspression

coefficient 

100

a copy of a figure where every length in the original figure is multiplied by the same number

scaled copy

200

the unit rate, multiplying a value in a proportional relationship by this gives the corresponding value

constant of proportionality

200

a grid of two  perpendicular axes that intersect at a point 

coordinate plane

300

when you have a factor value and you switch the value of the denominator and the numerator

resiprical

300

If you can multiply both numbers in a ratio by the same factor to get the numbers in another ratio

equivilent ratio

400

the point at which the perpendicular axes intersect in a coordinate plane 

origin

400

a set of equivalent  ratios, the values for one quantity are each multiplied by the same number to get the values for the other quantity

proportional relationship

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