Listed below are systolic blood pressure measurements (in mm Hg) obtained from the same woman. Find the regression equation, letting the right arm blood pressure be the predictor (x) variable. Find the best predicted systolic blood pressure in the left arm given that the systolic blood pressure in the right arm is 90mm Hg. Use a significance level of 0.05. Right arm 100 99 93 76 76

Left arm 176 169 145 141 143

the regression equation is?

I don't know how to do this...

Given that the systolic blood pressure in the right arm is 90 mm Hg, the best predicted systolic blood pressure in the left arm is mm Hg.