A band is planning a concert at a local theater. The graph below shows the ticket sales per hour. What is the slope of the line shown in the graph ?

Step-by-step explanation:

Slope of a line is defined as the change in the component of the y- axis to its x axis as shown;

slope = Δy/Δx =

From the graph, y2 = 0, y1 = 4000, x2 = 10, x1 = 0

slope =

The slope of the line is a negative slope and it is -400

The pairs of goldfish Tasha can buy for $20 are

Step-by-step explanation:

To find the how many type of goldfish that Tasha can buy for $20 is the set of positive ordered pairs.

Let x denote the number of fancy goldfish.

Let y denote the number of common goldfish.

To find how much goldfish can Tasha buy for $20 is to substitute the value for x in the equation

Now, substituting in , we get,

The ordered pair is

Similarly, substituting ,

For ,

For ,

For ,

For ,

For ,

Thus, the pairs of goldfish Tasha can buy for $20 are