Write a rule for the linear function in the table. i need help

x f(x)
0 3
3 15
6 27
9 39

f(x) = 4x + 3

f(x) = –4x – 3

f(x) = x + 3

f(x) = x + 3

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

Which of the following circles have their centers in the third quadrant? check all that apply.

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?