Determine the dye concentration in a solution

Question

A solution of a dye was calculated by the spectrophotometers, and the following calibration data were collected:

Dye concentration                           Absorbance at 475nm

1.5 X 10^-6M                                        0.36

3.5 X 10^-6M                                        0.59

0.5 X10^-6  M                                       0.24

2.5 X 10^-6M                                        0.44

4.5 X 10^-6M                                        0.70

1. Create a calibration plot, and calculate the slope and intercept.

2. Determine the dye concentration in a solution with A =0.52?