1. Bellwork December 2 - 6 1. Solve for y: 4x – 2y = 10
2. Find the y-intercept in the equation 4x – 2y = 10.

2. Ex #1 x y
An oil tank is being filled at a constant rate. The table shows that the depth of oil is a function of the number of minutes the tank has been filling.
1. Write an equation that represents the table.
Do I know my y-intercept?
2. Find the depth of oil after one half-hour.
9 feet

3. Ex #2
Helen is in a bicycle race. She has already biked 10 miles and is now biking at a rate of 18 miles per hour. Her distance as a function of time is shown in the graph. y x
1. Write an equation to show the relationship between the distance biked and the time in hours.
y = 18 ● x
+ 10

4. Ex #2
Helen is in a bicycle race. She has already biked 10 miles and is now biking at a rate of 18 miles per hour. Her distance as a function of time is shown in the graph. y x
2. Identify the slope and the y-intercept and describe their meanings.
slope: 18
Helen’s speed.
y-intercept: 10
The distance she has already biked.

5. Ex #2
Helen is in a bicycle race. She has already biked 10 miles and is now biking at a rate of 18 miles per hour. Her distance as a function of time is shown in the graph. y x
3. How far will Helen have biked after 3 hours?
miles

6. You Try
Toni is finishing a scarf at a constant rate. The table shows the number of hours Toni has spent knitting this week and the corresponding number of rows in the scarf. x y
1. Write an equation in slope-intercept form to represent this linear function.
Do I know my y-intercept?

7. You Try
Toni is finishing a scarf at a constant rate. The table shows the number of hours Toni has spent knitting this week and the corresponding number of rows in the scarf. x y
1. Write an equation in slope-intercept form to represent this linear function. 38 = 3 ● 2
+ b
38 = 6 + b -6 -6
32 = b

8. You Try
Toni is finishing a scarf at a constant rate. The table shows the number of hours Toni has spent knitting this week and the corresponding number of rows in the scarf. x y
2. How many rows has Toni knitted after 10 hours?
62 rows

9. You Try
A closet organizer charges a $100 initial consultation fee plus $30 per hour. The cost as a function of the number of hours worked is graphed below. y
1. Write an equation that represents the cost as a function of the number of hours worked. x
y = 30 ● x
+ 300

10. You Try
A closet organizer charges a $100 initial consultation fee plus $30 per hour. The cost as a function of the number of hours worked is graphed below. y
2. Identify the slope and the y-intercept and describe their meanings. x
slope: 30
The amount charged per hour.
y-intercept:
100
The initial fee.

11. You Try
A closet organizer charges a $100 initial consultation fee plus $30 per hour. The cost as a function of the number of hours worked is graphed below. y
3. How much money will the organizer make after 10 hours? x