Use the graph shown to complete the following sentence. if (4, y) is an ordered pair of the function, then y = ___.

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)