Writing Linear Equations

A fitness club opens with 80 members. Each month the membership increases by 15 members. Which equation represents the relationship between the number of months the club has been opened, x, and the total fitness club membership, y?

• y=15x

• y=15x+80

• y=x+15

• y=80x+15

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

Jacob collects hats.  He has 6 hats already, and he collects 2 hats a week.

• y = 2x + 6

• y = 6x + 2

• y = 2x - 6

• y = 6x - 2

y=mx+b

Mathematical Equivalence

ON

The equation written in STANDARD form is (a)   .

• y = 1/2x + 2

• y - 3 = -5(x + 2)

• -7x + 2y = 9

• 3x + 2 = y

Write a linear equation in y=mx+b form.

Mathematical Equivalence

ON

Write an equation in standard form given the

x-intercept of 5 and a y-intercept of 5.

Mathematical Equivalence

ON

Write an equation in y=mx+b form.

Mathematical Equivalence

ON

Match the following equations with their forms.

• Standard form

• 3x + 2 = y

• Slope-intercept form

• -7x + 2y = 9

• Slope-intercept form

• 3x + 5y = 4

• Standard Form

• y = 1/2x + 2