Which equation of the least squares regression line most closely matches the data set?
(4,30)
(6,38)
(8,44)
(10,50)
(12,55)

A) y=3.1x+18.6
B) y=0.59x+3.29
C) y=1.13x-14.69
D) y=0.32x-5.89

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?