need this done asap, please show work and will give 3 brainliest for this question and 2 other ones ❤️❤️❤️❤️

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )