Unit 4 Review- Math

Lee charges $3 for a basket and $2.50 for each pound of fruit picked at the orchard. Write an equation in y = mx + b form for the total cost of x pounds of fruit from the orchard.

• y = 3x + 2.5
• y = 2.50x + 3
• y = 2.50x 
• y = 3x + 2.50

You plan to go snowboarding. The resort charges $15 an hour in addition to $25 to rent a board. Write an equation that represents the cost to go snowboarding for the day.

• y=15x-25
• 15x+25y=100
• 25x+y=15
• y=15x+25

What is the formula of this graph?

• y = - 2/3x + 5

• y = 2/3x + 5

• y = - 5x + 2/3

• y = 5x + 2/3

There were approximately 11,000 students enrolled at Western Carolina last year. This figure goes up by about 225 students each year. Create an equation that can be used to find y, the total number of students, if x represents the number of years?

• y=225x+11000

• y=11000x+225x

• x=225y+11000

• y=225x

Suppose that the water level of a river is 34 feet and that decreases at a rate of 0.5 foot per day. Write an equation that can be used to find y, the water level, if x represents the number of days?

• y= - 0.5x+34

• y= 0.5x+34

• y= - 34x+0.5

• y= 34x+0.5

What is the slope-intercept equation?

• y= 4x - 17

• y = 4x - 21

• y = 21x - 4

• y= -1x + 4

What is the algebraic equation for the following table?

• y = x + 3

• y = 3x

• y = x ÷ 3

• y = x - 3

Which equation matches the table?

• y = 3x + 9
• y = x + 9 
• y = x + 3
• y = 12x - 3

What is the equation of the linear function?

• y = -3x + 10
• y = -3x + 16
• y = 3x + 10
• y = 3x + 16

What is the equation of the linear function?

• y = -3x + 10
• y = -3x + 16
• y = 3x + 10
• y = 3x + 16