Which one should I choose

The sixth grade art students are making a mosaic using tiles in the shape of right triangles. each tile has leg measures of 3 centimeters and 5 centimeters. i f there are 200 tiles in the mosaic what is the area of the mosaic.

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

How do you solve a question like this?