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MF.PR.4 Standard MF-018-A06-V02

Use ratio tables and double number lines to solve missing-value and scaling problems.

Solve a contextual double-number-line problem

Problem

A store uses this double number line to show the cost of notebooks. The aligned tick marks represent matching values.

Notebooks: \(0\), \(1\), \(3\), \(5\), \(7\)
Cost (\(\$\)): \(0\), \(3\), \(9\), \(15\), \(?\)

What cost lines up with \(7~\text{notebooks}\)?

Double number line for notebook cost. The top line is labeled Notebooks with aligned ticks marked 0, 1, 3, 5, 7. The bottom line is labeled Cost ($) with matching ticks marked 0, 3, 9, 15, and a question mark at the tick aligned with 7 notebooks. The final aligned tick is highlighted. Open full size
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Four variants of this problem type
Curriculum context
Standard
MF.PR.4
Category
Proportional Reasoning
Domain
Representations
Objective
Use ratio tables and double number lines to solve missing-value and scaling problems.
Problem type
Solve a contextual double-number-line problem