Graphing Equations and Writing Equations

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Which equation matches the description if x is the number of minutes and y is the total cost.

• y = 1.20

• y= 1.20x

• x = 1.20

• x = 1.20y

The graph shows the total money earned at a fundraising car wash. Which equation can be used to find the total earned y for the number of cars washed x?

• y = x + 5

• y = x/5

• y = x - 5

• y = 5x

Which equation matches the table?

• y = 5x

• y = 5x + 1

• y = x + 5

• y = x + 1

Gourmet chocolate costs $5.25 per pound. Which equation best represents y, the total cost of x pounds of chocolate?

• x = 5.25y

• y = 5.25 + x

• y = 5.25x

• x = 5.25 +y

The table shows the ounces of water,y, need to for x number of servings.

Based on the information in the table, which equation can be used to model the relationship between x and y?

• y = 2x

• y = x + 2

• y = 18x

• y = x + 18

The graph shows the amounts of money raised for scholarships over a four month period.

Based on the graph, what is the constant rate of earnings for scholarships? (How much was raised per month?)

• $500 per month

• $1,000 per month

• $2,000 per month

• $4,000 per month

Which of these equations represent the table above if the number of tickets represents x and the total cost represents y?

• y=2x

• y=54x

• y=27x

• y=x

What is the algebraic equation for this table?

• y = x + 3

• y = 3x

• y = x ÷ 3

• y = x - 3

Which equation represents the table of values?

• y = 400

• y = 400x

• y = x + 400

• y = 400x + 800