Slope and Y-intercept from different representations

• y = 0.8x + 0.1

• y = 0.1x + 0.8

Answer explanation

0.1 pounds per day

(rate)

0.8 pounds at birth

(initial value)

Which equations represents the verbal description?

• y = 6x + 27

• y = -6x + 27

• y = 27x - 6

Answer explanation

-6 is the rate because he USES 6 gallons of gas per hour

What is the initial value (y-intercept) ?

• 50 tiles to start

• 200 tiles to start

• 250 tiles to start

What is the rate of change (slope) ?

• 50 tiles per minute

• 1 tile per minute

• 250 tiles per minute

Answer explanation

At 0 minutes there are 200 tiles (0,200)

After 50 minutes there are 250 tiles (50,250)

250-200= 50 tiles

50-0 = 50 minutes

50/50 = ? tiles per minute

What is the rate of change (slope)?

• -1/3 (1 gallon every 3 minutes)

• -1/4 (1 gallon every 4 minutes)

• -1/5 (1 gallon every 5 minutes)

Answer explanation

At 0 seconds there is 5 gallons of water (0,5)

After 5 seconds, there are 4 gallons of water (5,4)

4-5 = -1 gallons

5-0 = 5 seconds

Which equation represents the table?

• y = 4x + 0.25

• y = 0.25x

• y = 0.25x + 4

• y = 4x

Answer explanation

Starts at

0 toppings cost $4 (0,4)

Goes to

1 topping costs $4.25 (1,4.25)

$4.25-$4.00 = 0.25

1-0 = 1 topping

Find the rate (slope) of the table.

• 15.00 dollars

  per hour

• 22.50 dollars

  per hour

• 7.50 dollars

  per hour

• 6.50 dollars

  per hour

Answer explanation

(0,15)

(1, 22.50)

22.50 - 15 = $ 7.50

1 - 0 = 1 hour

The line graphed has an x-intercept of ​ (a)   and a y-intercept of ​ (b)   .

• (1,0)
• (0,-4)
• (-4,0)
• (0,1)
• (1,-4)
• (-4,1)

Match the Graph with its slope.

• Negative

• 
• Positive

• 
• Undefined

• 
• Zero

• 

Find the rate (slope) of the table.

• 15.00 dollars

  per hour

• 22.50 dollars

  per hour

• 7.50 dollars

  per hour

• 6.50 dollars

  per hour

Answer explanation

(0,15)

(1, 22.50)

22.50 - 15 = $ 7.50

1 - 0 = 1 hour