Given four functions , which one will have the smallest y-interception

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a