Will give brainlestt which equation represents a line that is perpendicular to the line graphed? a) y = 3 b) x = 1 c) y = -3 d) y = 3x + 1

I'm terrible at math any here is appreciated.

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.

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?