1. The data table below shows the median diameter of
grains of sand and the slope of the beach for 9
naturally occurring ocean beaches.
Median Diameter of
Grains of Sand,
in Millimeters (X)
Slope of Beach,
in Degrees (y)
0.17 0.19 0.22 0.235 0.236 0.3 0.35 0.42 0.85
0.63 0.7 0.82 0.88 1.15 1.5 4.4 7.3 11.3
Write the linear regression equation for this set of
data, rounding all values to the nearest thousandth.
Using this equation, predict the slope of a beach, to
the nearest tenth of a degree, on a beach with grains
of sand having a median diameter of 0.65 mm.