I really need help on this I got the first part but I don’t understand the two other parts b and c. I have an F in math so I really need help!. The C. Part is “the total predicted numbers of sold cars for the year is____. And the b. Part is in the picture.

I really need help on this I got the first part but I dont understand the two other parts b and c I have an F in math so I really need help The C Part is the to class=