Assume that when adults with smartphones are randomly selected, 52 % use them in meetings or classes. if 15 adult smartphone users are randomly selected, find the probability that exactly 9 of them use their smartphones in meetings or classes.

The first sentence is just there to throw you off, so you divide 9 into 15 to find the probability of 9 people using their smartphones in a meeting of 15 people, this gives you a 60% chance.

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!

Do the inverse operation