8th Grade Challenge: Linear & Exponential Equations

A car rental company charges a flat fee of $30 plus $0.20 per mile driven. If you drove 150 miles, how much would you pay in total?

• $60

• $90

• $45

• $75

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A population of bacteria doubles every 3 hours. If you start with 500 bacteria, how many will there be after 9 hours?

• 1000

• 4000

• 8000

• 2000

Tags

CCSS.HSF.LE.A.4

A linear function is represented by the equation y = 2x + 5. What is the value of y when x = 4?

• 15

• 10

• 13

• 8

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A bank offers an account that earns 5% interest compounded annually. If you deposit $1,000, how much will you have after 2 years?

• 1102.50

• 1150.00

• 1200.00

• 1050.00

The cost of a concert ticket is $50, and it increases by $5 each year. What will be the cost of the ticket in 4 years?

• $75

• $60

• $70

• $80

Tags

CCSS.HSF.BF.A.2

A tree grows exponentially, increasing its height by 10% each year. If the tree is currently 2 meters tall, how tall will it be after 3 years?

• 2.5

• 2.662

• 2.0

• 3.0

A linear equation is given as 3x - 12 = 0. What is the value of x?

• 4

• 8

• 6

• 2

Tags

CCSS.7.EE.B.4A

A smartphone's value decreases by 20% each year. If it was originally worth $600, what will its value be after 2 years?

• $384

• $480

• $500

• $300

Tags

CCSS.HSF.BF.A.2

The equation of a line is given as y = -3x + 12. What is the y-intercept of this line?

• 12

• 0

• -3

• 10

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

A savings account has an initial balance of $200 and earns $10 each month. How much will be in the account after 6 months?

• $240

• $300

• $250

• $260

Tags

CCSS.HSF.BF.A.2