Which phrase describes a nonlinear function

a the area of a circle as a function of the radius
b the perimeter of a square as a function of the side length
c the cost of gasoline as a function of the number of gallons purchased
d distance traveled by a car moving at constant speed as a function of time

This needs to be done quick you are studying different function tools and begin working with this function y=-160-9(x) use the equation to answer the question y=-160-9(x) what is the y value when x equals -13? y=-160-9(x)

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

What is the distance between point a and b