Castle learning which equation of a line passes through 1,4 and slope is 3

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

Solving algebraic equations 2m+3=11