I need help with this one an can somebody explain this to me?

Which of the following is true for the relation f(x)=2x^2+1

What is the value of x in the equation7x+2y=48 when y=3

The frequency table shows the results of a survey asking people how many hours they spend online per week. on a piece of paper, draw a histogram to represent the data. then determine which answer choice matches the histogram you drew. in order here is the.. hours online: 0-3, 4-7, 8-11, 12-15, and 16-19. frequency: 5, 8, 10, 8, 7 answer for the question is in the picture! : )