q20.

Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury, for a sample of adults. The following table presents the results.

Systolic Diastolic

134 87

123 77

130 76

112 75

108 69

154 94

115 83

119 69

Use the TI-84 calculator.

Part: 1 / 2

Compute the least-squares regression line for predicting diastolic pressure (y) from systolic pressure (x). Round the slope and y-intercept values to at least four decimal places.

The regression equation is y (hat) = .

Part 2/2 will follow

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