What is the cost of 7 gallons of gas? Complete the table

The graph represents f(x)=[x]+3. what is f(-2.2)?

What is the domain of the step function f(x)=[2x]-1?

Shape a is congruent to shape , as shown by a reflection across the y-axis and then a translation down units. shape b is congruent to shape , as shown by a reflection across the y-axis and then a translation down units.