Writing a Linear Equation from a Graph

Use the graph to write an equation of the line and interpret the slope

• y = 1 /5 x; The tip increases $0.20 for each dollar spent on the meal.

• y = 5x; The tip increases $0.50 for each dollar spent on the meal.

• y = -1/5 x; The tip increases $0.20 for each dollar spent on the meal.

• y = 5x; The tip increases $0.20 for each dollar spent on the meal.

Answer explanation

Slope = change of y/ change of x

Tags

CCSS.8.EE.B.5

Use the graph to write an equation of the line and interpret the slope.

• y = − 1/30x + 10; The fuel decreases 1/30 gallon for every mile driven.

• y = 30x + 12; The fuel decreases 30 gallon for every mile driven.

• y = 1/30x + 12; The fuel decreases 1/30 gallon for every mile driven.

• y = − 1/30x + 12; The fuel decreases 1/30 gallon for every mile driven.

Tags

CCSS.HSF.LE.B.5

Use the graph to write an equation of the line and interpret the slope.

• y = -50x - 100; The balance increases $20 each week.

• y = 50x + 50; The balance increases $50 each week.

• y = 50x + 100; The balance increases $50 each week.

• y = 2/100x + 50; The balance increases $50 each week.

Tags

CCSS.HSF.LE.B.5

Use the graph to write an equation of the line and interpret the slope.

• y = 2/3 x; The height increases .67 feet each year

• y = 3/2 x; The height increases 1.5 feet each year

• y = -2/3 x; The height decreases .67 feet each year

• y = -3/2 x; The height decreases 1.5 feet each year

Tags

CCSS.8.EE.B.5

Use the graph to write an equation of the line and interpret the slope.

• y = 2x; The number of words increases by 2 each minute.

• y = 110x; The number of words increases by 110 each minute.

• y = 55x; The number of words increases by 55 each minute.

• y = -55x; The number of words decreases by 55 each minute.

Tags

CCSS.HSF.LE.B.5

Use the graph to write an equation of the line and interpret the slope.

• y = −60x + 480; The volume decreases 60 cubic feet per hour

• y = −120x + 480; The volume decreases 120 cubic feet per hour

• y = −1/60x + 500; The volume decreases 1/60 cubic feet per hour

• y = −60x + 500; The volume decreases 60 cubic feet per hour

Tags

CCSS.HSF.LE.B.5

Describe and correct the error in interpreting the slope in the context of the situation.

• The original balance of $100 should have been included; After 7 years, the increase in balance will be $170, resulting in a new balance of $170.

• The original balance of $0 should have been included; After 7 years, the increase in balance will be $10, resulting in a new balance of $70.

• The original balance of $0 should have been included; After 7 years, the increase in balance will be $100, resulting in a new balance of $170.

• The original balance of $100 should have been included; After 7 years, the increase in balance will be $70, resulting in a new balance of $170.

Tags

CCSS.HSF.LE.B.5

Describe and correct the error in interpreting the slope in the context of the situation.

• The slope was correct; The slope is 11, so the income is $3 per hour

• The slope was miscalculated; The slope is 11, so the income is $11 per hour

• The slope was miscalculated; The slope is 3, so the income is $3 per hour

• The slope was correct; The slope is 3, so the income is $3 per hour

Tags

CCSS.8.EE.B.5