HW11_11_Review_T2_Q2_WritingLinearEquation

Concert tickets cost $15 for general admission, but only $9 with a student ID. Ticket sales total $4500. Write an equation that models this situation let general admission be x, and the cost with a student ID be y.

• 15x - 9y = 4500

• 9x + 15y = 4500

• 15x + 9y = 4500

• -15x + 9y = 4500

Caroline weighs her new puppy every month to see how much it has grown. If age is a and weight is W, which of these is the correct equation for the line of best fit?

• W = 8.9a + 3.6

• W = 3.6a + 8.9

• a = 8.9W + 3.6

• W = 3.6 + 8.9

• y+3=2(x-5)

• y-3=2(x+5)

• y+3=2(x+5)

• y+3=-2(x+5)

• y-3=-5(x-1)

• y+3=5(x-1)

• y+3=-5(x-1)

• y+3=-5(x+1)

Which of the following represents a positive correlation?

• The size of a person and the number of fingers he has

• The size of a jar of baby food and the number of jars a baby will eat

• The number of hours a plane is in flight and the number of miles flown.

• The number of hours in flight and the gallons of fuel remaining.

The graph of a linear function is shown on the grid. Which equation is best represented by this graph?

For the equation
y - 3 = 2(x + 4),
the line has a slope of 2 and contains what point?

• (-4, 3)
• (3, -4)
• (-3, -4)
• (-4, -3)

For the equation

y + 3 = -4(x - 2),

which of the following is true?

• The line has m = −4 passing through the point (2, -3)

• The line has m = 4 passing through the point (3, −2)

• The line has m = 3 passing through the point (-4, -2)

• The line has m = −4 passing through the point (−3, 2)

The booster club made $708 on homecoming T-shirt sells. Small t-shirts cost $12 while large t-shirts cost $14. If x is small t-shirts and y is large t-shirts, what equation represents this.

• 12x + 14y = 708

• 14x + 12y = 708

• 708x + 14y = 12

• 12x + 708y = 14

Jenny went to the sale at Kohl's last weekend.  
T-shirts were on sale for $15 each and hoodies were on sale for $20 each.  If she spent $150 total, write an equation to represent this situation.  

• 20x + 15 = y 
• 35x = y 
• 15x + 20y = 150 
• 150 - 20x = 15y