Fill in the blank: least squares is the method for determining a line of best fit

a-best
b-only
c-most commonly used
d-least accurate, but easiest

Geometry answer picture question pls . reason and statements

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.