Python Programming: An Introduction to Computer Science

10.6. EXERCISES 175

11. RedotheregressionproblemfromChapter8 usingaRegressionclass.Yournewclasswillkeep
    trackofthevariousquantitiesthatareneededtocomputea lineofregresion(therunningsumsofx,y,
    x^2 andxy)Theregressionclassshouldhave thefollowingmethods.

init Createsa new regressionobjecttowhichpointscanbeadded.

addPointAddsa pointtotheregressionobject.

predictAcceptsa valueofxasa parameter, andreturnsthevalueofthecorrespondingyontheline

ofbestfit.

Note:Yourclassmightalsousesomeinternalhelpermethodstodosuchthingsascomputetheslope

oftheregressionline.

12. Implementa cardclassthatrepresentsa playingcard.Useyourclasstowritea programthat“deals”
    a randomhandofcardsanddisplaysthemina graphicswindow. Youshouldbeabletofinda freely
    availablesetofcardimagestodisplayyourcardsbysearchingontheInternet.