Unit 9 Review: Identifying Mathematical Models Quiz

Does this data show a linear, exponential, or quadratic model?

• Linear

• Quadratic

• Exponential

• None of the above

Answer explanation

There is a constant first difference in y for consecutive x-values. In this instance the difference is 9.

Does this data show a linear, exponential, or quadratic model?

• Linear

• Quadratic

• Exponential

• None of the above

Answer explanation

Constant 2nd difference in y for consecutive x-values

Does the data plotted show a linear, quadratic, or exponential set of data?

• Linear

• Quadratic

• Exponential

• None of the above

Answer explanation

Curve on both sides of the graph: Quadratic

• Linear

• Exponential

• None of the above

• Linear-Quadratic

Tags

CCSS.HSA.REI.C.7

• (-3, 0) and (1, 8)

• (3, 7) and (5, 11)
• (0, 6) and (-2, 8)
• no solutions

Answer explanation

Set the expressions equal to each other. Solve for 0 (I forgot to write =0 in the picture). Factor then solve for x. Plug each x-value into the equation to find the corresponding y-value.

Tags

CCSS.HSA.REI.C.7

What is the value of f(5) in the given piecewise function?

• 9

• 3

• 29

• 5

Answer explanation

Tags

CCSS.HSF.IF.A.2

Consider the graph below.

• This graph represents a function.

• This graph does not represent a function because there is a point with an open circle.

• This graph does not represent a function because the rate of change is not constant.

• This graph does not represent a function because it is both linear and quadratic.

• no solution

Answer explanation

Set inequality to zero, then factor. Set each factor to zero and solve. These are the critical values. Put those values on a number line and check numbers before or after.

Miah is solving the inequality shown. Part of her work is shown. What would be an appropriate next step for Miah to take?

• Set each factor equal to zero and solve for x.

• Graph the inequality to find the solution set.

• Add 3 to both sides of the inequality.

• Multiply out the factors to return to the original quadratic inequality.

Which value(s) are imaginary? Select all that apply.

• 5i

• √-81

• (2i)²

• -√36

• √23

Tags

CCSS.HSN.CN.A.1