What is the reflection of the point (4,-3) across the line y=x (on a graph)

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

I’m how many different ways can she give the four remaining flowers to the rest of the teachers in the afternoon