FARMING Some crops, such as barley, are very sensitive to how acidic the soil is. Barley grows best in soil with a pH range of 6 to 7.5. To determine the ideal level of acidity, a farmer measures how many bushels of barley he harvests in different fields with varying acidity levels.
Soil acidity (pH) 5.7 6.2 6.6 6.8 71
Busheis Harvested 3 20 48 61 73

a. Find the equation for the best-fit line for the data and the correlation coefficient. Round to the nearest hundredth, if necessary.
Y = ___ x + ___
R =_____