− 2.5 = −3 help me please

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)