NEED HELP ASAP!!!This scatter plot shows the relationship between the amount of time, in hours, spent working on an essay and the grade, as a percent, earned. Enter the approximate slope of the estimated line of best fit.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75