Help plz I really need to finish

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is