Please answer correctly

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points