Representations of Linear Functions

Jenny writes the equation y = 1/2x +5.
Why is she incorrect?

• The slope is -2, the equation should be
  y = -2x + 5

• The y-intercept is 4, the equation should be y = -2x + 4

• The slope is -1/2, the equation should be
   y = -1/2x + 5

• The y-intercept is -5, the equation should be y = -2x - 5

A camp charges families a fee of $625 per month for one child and a certain amount more per month for each additional child. Use the graph to write an equation in slope-intercept form to represent the amount a family with x additional children would pay.

• y = 625x + 225

• y = 225x 

• y = 225x + 625

• y =  625

Pablo has $12. He earns $7 for every lawn he mows. Write an equation to find the amount of money "y" he will have after "x" number of lawns.

• y = 12x + 7

• y = 7x + 12

Write the equation in slope intercept form.

• y = 2x + 3

• y = 3x + 2

• y = 2x - 1

Which equation matches the table?

• y = 3x + 9

• y = x + 9 

• y = x + 3

• y = 12x - 3

Select the verbal description that most appropriately fits the equation.

• I have $400 and plan to earn $50 per week.

• I have $400 and plan to spend $50 per week.

• I owe $400 and plan to pay back $50 per week.

• I owe $400 and plan to borrow an additional $50 per week.

Select the verbal description that most appropriately fits the equation.

• I have $400 and plan to earn $50 per week.

• I have $400 and plan to spend $50 per week.

• I owe $400 and plan to pay back $50 per week.

• I owe $400 and plan to borrow an additional $50 per week.

1) Which table contains only coordinates of points that appear to be on the line below?

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2) Which line appears to contain both ordered pairs from this table?

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3) Which line appears to be a graph of the equation shown?

y = -2x -1

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