5.3+Rate+Of+Change+And+Slope

How Do you find the rate of rate of change And Slope On A Graph? ** ||  || Math Website : [] ||   || . Examples :
 * **// EQ: //
 * **//​Friends : Dependent Variable, Independent Variable , Slope , X Axis , And Y Axis .//**
 * // Interests : Down Hill Mountain Skiing, Studing the Stock market , monerating Heart Rate , Constructing Railway. //**
 * 1. Find the slope of a line passing through the points (4,5) and (7,9)**
 * //2.//**
 * Year || 1995 || 1997 || 2000 || 2003 ||
 * Cost || 21 || 26 || 26 || 30 ||

Link : Examples of rate of change and rate