Which parallelograms have perpendicular diagonals

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

10 points? me . its important ‼️‼️

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?