What is the equation of the blue line?

y = (a)   x + ​ (b)  

The line y = -5/4x - 1 is shown.

If the constant +4 is added to create the line y = -5/4x + 3, which best describes this change?

What do you do if there are two numbers in "the middle" when you are finding the median for a box plot?

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles.

What is the probability of selecting 2 purple marbles without replacement?

​ (a)   /​ (b)