Please read the question carefully, someone did this for me and got it wrong! For part A is asks 2x+3y=21 Part B is y=1/3 x^2

I Time Grades 9-12 Lessons Assessments Gradebook Email Tools My Courses A railroad's track can be determined using the following graph. 10 -8 - N W -10 -9 8 -7 -6 -5 -4 -3 -2 -10 1 2 3 4 5 6 7 9 10 Several different roadways are in the same region as the railroad. Part A: A highway's path can be found using the equation 2x + 3y = 21. Use the graphs of the functions to determine the number of intersections there will be between the railroad and the highway, and explain completely. (5 points) Part B: A tumpike's route is determined by the equation y = -x2. Prove algebraically how many intersections there will be between the railroad and the turnpike, showing all necessary work. (5 points)