Model Linear Relationship

Samantha buys one vase and x roses. The vase costs $15 and each rose costs $2. What function equation represents the amount of money Samantha spends?

• f(x)=2x-15

• f(x)=15x-2

• f(x)=15x+2

• f(x)=2x+15

One year after Sarah started a new job, she had $1200 in her savings account. Each year she added $900 more to the savings account. What function, written in sequence notation, models Sarah's savings account balance n years after starting her one job?

• a_n=300n+900

• a_n=300n+1200

• a_n=900n+300

• a_n=900n+1200

A business spends $3500 to purchase a copy machine. The business also spends $125 per month on maintenance and supplies for the copy machine. What function equation represents the total cost of the copy machine after x months?

• f(x)=125x-3500

• f(x)=3500x-125

• f(x)=3500x+125

• f(x)=125x+3500

One year after graduating from college, Sam earned $42,000. Each year, he earned $4000 more. What function, written in sequence notation, models Sam's earnings n years after graduating college?

• a_n=4000n+46,000

• a_n=38,000n+4000

• a_n=4000n+38,000

• a_n=42,000n+4000

What linear function can be represented by the set of ordered pairs? { (-1,-10), (3,2), (5,8), 7,14) }

• f(x)=6x-22

• f(x)=3x-7

What linear function can be represented by the set of ordered pairs? { (-4,15), (0,5), (4,-5), (8,-15) }

• f(x)=(-5/2)x+5

• f(x)=11x+5

What function is represented by the graph?

• f(x)=-2x+3

• f(x)=2/3x-2

• f(x)=-2/3x+2

• f(x)=3x-2

What function equation is represented by the graph?

• f(x)=2/3x-3/2

• f(x)=2/3x+1

• f(x)=-2/3x+1

• f(x)=3/2x+1

What function equation is represented by the graph?

• f(x)=-2x-1

• f(x)=1/2x-1

• f(x)=-2x-1/2

• f(x)=-x-2

What function equation is represented by the graph?

• f(x)=-1/4x=3

• f(x)=1/4x+3

• f(x)=-4x-3

• f(x)=1/4x-3