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MF.PR.4 Warmup MF-018-A02-V04

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

Find a missing value on a double number line

Problem

A double number line shows pounds of apples on the top line and total cost on the bottom line. The aligned labels include \(1.5~\text{pounds}\) with \(\$4.50\) and \(3~\text{pounds}\) with \(\$9.00\). At another aligned tick, the bottom line shows \(\$15.00\). What number of pounds should be on the top line at that tick?

Double number line with pounds of apples on the top line and total cost on the bottom line. Labeled aligned ticks show 1.5 pounds with 4.50 dollars and 3 pounds with 9.00 dollars. Another aligned tick shows 15.00 dollars on the bottom line, and the top line at that tick is blank. 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
Find a missing value on a double number line