Percentages of public school students in fourth grade in 1996 and in eighth grade in 2000 who were at or above the proficient level in mathematics are given for eight western states. Find the equation of the least-squares line that summarizes the relationship between x = 1996 fourth-grade math proficiency percentage and y = 2000 eighth-grade math proficiency percentage. (Give the answer to three decimal places.)  =          State 4th grade (1996) 8th grade (2000) Arizona 15 20 California 11 17 Hawaii 16 15 Montana 22 36 New Mexico 13 12 Oregon 21 31 Utah 23 25 Wyoming 19 24

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