Help me answer this please

Answer this question! 30 points and brainliest!

1. what is the measure of ∠abc? what is the measure of ∠abd?

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)