Devon wants to write an equation for a line that passes through 2 of the data points he has collected. the points are (8, 5) and (–12, –9). he writes the equation 7x – 10y = 3. is this a good model? explain your reasoning.

Which graph represents the following piecewise defined function?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The correlation coefficient between the number of students and marks obtained in end semester exam. (13 marks) give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 marks) draw the number of students and marks obtained in end semester exam scatter diagram c. (4 marks) check list write your name and id corectly write the question number properly use your own calculator. show all the steps to solve the problems. use the correct formula. answer in provided time. don't use your mobile for any purpose. write your answer up to two decimal places