Scientists searching for higher performance flexible structures created a diode with organic and inorganic layers. It has excellent mechanical bending properties. Applying a bending strain to the diode actually leads to higher current density \(\left(\mathrm{mA} / \mathrm{cm}^{2}\right)\). Metal curvature molds, each having a different radius, were used to apply \(\operatorname{strain}(\%)\). For one demonstration of the phenomena.

(a) Obtain the least squares line.

(b) Predict the current density when the strain \(x=\) 0.50 .

Strain (%) Current density(mA/cm) x y 0.00 3.47 0.25 3.57 0.49 3.68 0.64 3.73 0.80 3.86 1.08 3.99