Slope or Y-intercept in Functions

What variable is typically used to represent slope?

• x

• y

• m

• b

What is the slope of the following graph?

• 1

• 2

• 1/2

• 0

What is the slope of the following graph?

• 1

• 2

• 1/2

• 0

• 
• 
• 
• 

The variable y has a proportional relationship with x as suggested by the graph. Use the graph to write an equation that models the line.

• y=2x

• y=-x

• y=x

• y=x+1

The graph shows a proportional relationship between a​ family's water use per gallon, y, and the the number of gallons of water used, x. Write an equation for the relationship shown by the graph.

• y=x

• y=5x

• y=10x

• y=2x

The amount of​ money, y, pizzeria Upper J makes by selling x pizzas can be modeled by the equation y=18x.

The relationship of the amount of money pizzeria Upper W

makes is shown in the following graph. Which pizzeria makes more money per​ pizza?

• They make the same amount per pizza.

• Pizzeria Upper W makes more money per pizza.

• Pizzeria Upper J makes more money per pizza.

• They make the same amount.

Multiple Representations  
Gwen goes to the mall to buy jeans. The equation y=19x models the total cost y of x pairs of jeans at store Z. The table shows the relationship between the total cost and the number of Store V. 


Store V Pairs of Jeans                

                                                                                   Total Cost​
                                                                     2              $34
                                                                     3              $51
                                                                     4              $68


Which store charges more per pair of​ jeans?


Which store charges more per pair of​ jeans?

• Store V

• Both

• Store Z

• Neither

What is the y-intercept of this graph?

• (0,1)
• (0,-2)
• (0,0)
• (0,3)

What is the y-intercept?

• (0,7)
• (0,0)
• (1,9)
• (2,11)