What happens to the price of a good when demand rises and supply stays the same?

Live · v4Flagged · low discriminationQ-2231Created 14 Feb 2026 by Tom Reyesv4 published 2 Sep 2026Owner · Curriculum, EconomicsSample data

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Question

Editing draft v5 · Saved 10:14

Type

Stem80 / 160

Options · select the correct answerShuffle order for learners · On

Correct

EditedWas “It depends only on the government”, picked by 0.5% of learners. Replaced with a common misconception from Mistakes.

Explanation · shown after answeringEdited

Details

Topic

Economics › Money › Prices

Learner level

Author difficulty

Changed from Easy. Measured today: 94% correct.

Used in 3 places

Publishing v5 updates all three at 00:00 UTC

Lesson cardWhy Prices Rise · card 6 (Check)Foundations of Markets › Money and Prices

Unit testMoney and Prices unit test · question 4Pass mark 70%

PracticeSupply and demand practice pool1 of 42 items

Item analysis

18,402 answers to v4 · first attempts only

Flagged 21 Sep · discrimination 0.18 (below 0.20)Strong and weak learners both get this right, so it tells you little. 94% correct is also close to the 95% too-easy line, and option D was almost never picked.

Correct94.1%target 40–85%

Discrimination0.18flag under 0.20

Median time9 sbank median 14 s

Option distribution

AIt risesCorrect94.1%

BIt falls3.2%

CIt stays the same, because supply did not change2.2%

DIt depends only on the government (v4 text)0.5%

Picked A (correct) by	Top 27%	Bottom 27%	Gap
Learners ranked by overall score	99.0%	86.4%	12.6 pts

Correct by learner level

86%

92%

96%

97%

98%

99%

Correct, weekly12 weeks · y-axis 85–100%

Learner reports 1

“C could also be right if the shop has stock put aside. The question should say ‘in the short run’.”Level 3 learner · 12 Sep · reason: Answer is ambiguous