Created by irenepapers
almost 5 years ago


Question  Answer 
Ratios  a comparison of two quantities (written as fractions) 
Ratios #2  Ratios can only form a proportion if they are equivalent. 
Equivalent Ratios  ratios that can be simplified to exactly the same value 
Equivalent Ratios #2  Equivalent ratios are equal to each other. 
How to Check if Two Ratios Form a Proportion (or are Equivalent):  Check to see if the cross products are equal. 
If Two Ratios are Equivalent:  1) a divided by b = c divided by d 2) Both ratios have the same simplified value. 3) The cross products are equal. 
Rates  a comparison of two quantities with units (usually has something to do with change) 
Unit Rate  the basic rate that all the other rates are equivalent to 
Unit Rate #2  The unit rate keeps the rate of change constant. 
Unit Rate #3  The denominator is always 1, and they all have a common denominator. 
Equivalent Rates  rates that represent the same value, but look different 
Equivalent Rate #2  The equivalent rate looks different, but has the same value. 
Equivalent Rate #3  The equivalent value has either the numerator or the denominator unknown. 
Equivalent Rate #4  For the equivalent rate, the basic rate stays the same, but has new conditions. 
Rate Table  summary of all the equivalent rates in a table 
Rate Table #2  All the rates in a rate table are equivalent and can be used to write problems. 
Rate Table #3  Since all the rate tables are equivalent, and can be used to write proportions, the rate table represents a proportional relationship. 
Independent Variable  input, x 
Dependent Variable  output, y 
Variable  a place holder (EX: m, n, x, v) 
Constant  stands alone 
Coefficiant  multiplies a variable (EX: 2x, 3n, 4m, 8d the number before the variable) 
***Proportional Relationship Equation  Dependent Variable = Unit Rate x Independent Variable OR **** y = cx **** 
Percent Proportion  part/whole = x/100 
Percent Proportion #2  The ratio of part of a number to the whole number is equivalent to the ratio of the percent value to 100. 
Percents  a ratio of a number to 100 