At a factory, the cost of making different numbers of toothbrushes is shown in the table below. A linear function models the cost based on the number of toothbrushes made. Which statement about the rate of change of this function is true?​

What does the sign of the slope tell you about a line?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n