Loraine is enrolled in an algebra class that meets 5days per week.Her instructor gives a test every Friday.Loraine has a study paln and keeps a portfolio with notes,homework,test corrections,and vocabulary.She also records the amount of time per day that she studies and does homework.The following data represent the amount of time she studied per day and weekly test grades.
a.Graph the points on a rectangular coordinate system.Do the data points appear to follow a linear trend?
b.Find a linear equation that relates Loraine’s weekly test score y to the amount of time shestudied per day x.(Hint:Pick two ordered pairs from the observed data,and find an equation of the line through the points.
c.How many minutes should Loraine study per day in order to score atleast 90% on her weekly examination?Would the equation used to determine the time Loraine needs to study to get 90%work for other students?
d.If Loraine is only able to spend ½ hr/day studying her math,predict her test score for that week.
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