Can anyone help me it’s algebra 2

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

How do i do this activity, is appreciated

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made