8th Grade Math Test, Mod 6

Which of these functions is linear?

Tags

CCSS.8.F.A.3

A taxi driver charges $1.25 per mile plus an additional $10 to carry luggage. Write a function to model the cost, c, to ride in the taxi for m miles with luggage.

Mathematical Equivalence

ON

Tags

CCSS.HSF-BF.A.1A

A taxi driver charges $1.25 per mile plus an additional $10 to carry luggage. If a trip cost $25, and the rider had luggage, how many miles did they ride?

Mathematical Equivalence

ON

Tags

CCSS.7.EE.B.4A

Answer explanation

These lines are parallel because they have the same slope but have a different y-intercept.

Select all correct statements about this graph.

• The domain includes negative real numbers.

• The graph is a function.

• The range includes negative real numbers.

• The domain is all real numbers.

• The graph is of a linear function.

Answer explanation

The graph is a parabolic function, not a linear one. The range does not include negative real numbers since the minimum of the function is at (3, 1).

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5

Write the equation for the line graphed in the coordinate plane in slope-intercept form.

Mathematical Equivalence

ON

A line passes through points (-8, -12) and (8, 6). What is the slope-intercept form of the equation of this line?

Mathematical Equivalence

ON

A line passes through points (3, 7) and has a slope of 3. Graph the line.

Answer explanation

Start with a point on (3, 7) and find a point that is up 3 units on the y-axis and to the right 1 unit on the x-axis.

Time for a break! If you could have any superpower, what would it be? Why?

Tags

CCSS.RI.2.1

CCSS.RI.3.1

CCSS.RL.1.1

CCSS.RL.2.1

CCSS.RL.3.1

Robert is a birthday clown. The table shows how much he charges per hour. What is the rate per hour and initial cost of his services?

Tags

CCSS.HSF-LE.A.1B