**TI83F* AppVariable file 04/07/08, 14:17Ý ÌMC206ÌÊnav F441BD13B950415AA7EB861D73925D5FMC206.MC2061  cross products¦cross products:ÖThe product of the terms on the diagonals when two ratios are compared.ÖExample:ÖIn the proportionÖ2/3 = 8/12 the cross products are 2 12 andÖ3 8. equivalent ratios Nequivalent ratios: ÖTwo ratios that have the same value.ÖExample: 5:4 = 10:8Ö inverse proportion`inverse proportion:Öa relationship that forms when the product of two variables is a constant.   proportionTproportion:ÖAn equation of the form a/b =c/d stating that two ratios are equivalent.  proportionalVproportional:ÖTwo quantities are proportional if they have a constant ratio or rate.  ratebrate:ÖThe ratio of two measurements having different units of measure.ÖExample: Ö60 miles per hour rate of changerate of change:Öa rate that describes how one quantity changes in relation to another. a rate of change is usually expressed as a unit rate.  ratio/ratio:ÖA comparison of two numbers by division.  scaleVscale:ÖA ratio or rate between the actual size of an object and the size of its model.   scale drawing`scale drawing:ÖA drawing that is similar to an actual object, but is either enlarged or reduced.   scale factor:scale factor:ÖA scale written as a ratio in simplest form.   scale modelgscale model:ÖA replica of an original object that is too large or too small to be built at actual size.  slopeqslope:Öthe rate of change between any two points on a line. The ratio of vertical change to horizontal change.   unit rate*unit rate:ÖA rate with a denominator of 1.  unit ratio.unit ratio:Öa ratio with a denominator of 1. ¹H