What is the slope and y-intercept of y= -0.6+6.78

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?