Writing Linear Equation s

What does the "b" stand for in y=mx+b?

• slope
• x-intercept
• y-intercept

A holiday meal costs $12.50 a person plus a delivery fee of $30.

• y = 30 + 12.5x 
• y = 12.5 + 30
• y = 12.5 + 30x
• y = 30 - 12.5x

The start up cost to join eTunes music is $7.95 plus $0.95 per song downloaded.  Write a linear equation that could be used to find how many songs he downloaded.

• y = 0.95x + 7.95
• y = 7.95x + 0.95
• y = 0.95x - 7.95
• y = - 0.95x + 7.95

In slope intercept form (y=mx+b) what is the "m"?

• The y-intercept
• The x-intercept
• The slope (rate of change)
• A point

What is the y-intercept in the equation?
y = 5x - 4

• 5
• -4
• -5
• 4

Find the slope

• -5/3
• -3/5
• 5/3
• 3/5

Which equation best represents the relationship between x and y in the table shown?

• y= 5x+5
• y=1/5x+5
• y=15x+5
• y=10x+5

Adrianna has $20 in her savings account. Each week she will add $5 to it. Which equation represents this situation?

• y=25x
• y=20x+5
• y=5x+20
• y=5x

Which situation can be represented by y=12x-4?
*Hint: Pay attention to your sign for your y-intercept*

• The number of eggs, y, in x dozen eggs for sale after 4 dozen eggs are sold
• The cost, y, of buying x movie tickets that sell for $8 each
• The cost, y, after a $4 discount, of buying x T-shirts that sell for $12 each
• The number of inches, y, in an x-foot-tall tree after cutting off 4 feet

Write the equation of the line that passes through the point (4, -2) and has a slope of -1/2.

• y = -1/2x + 3
• y = -1/2x
• y = -1/2x + 4
• y = -1/2x - 4