✅ Interpreting Slope & Intercept: Quick Check (S-ID.C.7)
Paginepagineapp.comInterpret the slope and intercept of a linear model in context. Work on your own. Then check your answers.
1. C = 3x + 70, where C is cost in dollars and x is months of a phone plan. What do 3 and 70 mean?
2. T = 18x + 26, where T is savings in dollars and x is weeks. What do 18 and 26 mean?
3. h = 4x + 15, where h is plant height in cm and x is weeks. What do 4 and 15 mean?
4. h = 5x + 26, where h is plant height in cm and x is weeks. What do 5 and 26 mean?
5. T = 8x + 30, where T is savings in dollars and x is weeks. What do 8 and 30 mean?
6. C = 17x + 6, where C is cost in dollars and x is months of a phone plan. What do 17 and 6 mean?
7. h = 11x + 27, where h is plant height in cm and x is weeks. What do 11 and 27 mean?
8. C = 9x + 72, where C is cost in dollars and x is months of a phone plan. What do 9 and 72 mean?
9. T = 25x + 76, where T is savings in dollars and x is weeks. What do 25 and 76 mean?
10. T = 25x + 13, where T is savings in dollars and x is weeks. What do 25 and 13 mean?
Score: ____ / 10 I can interpret the slope and intercept of a linear model in context: ☐ yes ☐ almost ☐ not yet
Answer key: 1) 3 = increase per one of x (months of a phone plan); 70 = starting value when x = 0 · 2) 18 = increase per one of x (weeks); 26 = starting value when x = 0 · 3) 4 = increase per one of x (weeks); 15 = starting value when x = 0 · 4) 5 = increase per one of x (weeks); 26 = starting value when x = 0 · 5) 8 = increase per one of x (weeks); 30 = starting value when x = 0 · 6) 17 = increase per one of x (months of a phone plan); 6 = starting value when x = 0 · 7) 11 = increase per one of x (weeks); 27 = starting value when x = 0 · 8) 9 = increase per one of x (months of a phone plan); 72 = starting value when x = 0 · 9) 25 = increase per one of x (weeks); 76 = starting value when x = 0 · 10) 25 = increase per one of x (weeks); 13 = starting value when x = 0
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Worksheets › Grade 9 Math (Algebra I) › Interpreting Slope & Intercept › Interpreting Slope & Intercept
Grade 9 (ages 14–15)Numbers & mathsFree printable PDF
About this grade 9 worksheet
Free Grade 9 Algebra I math worksheet (Common Core S-ID.C.7): interpreting slope & intercept — a ten-question quick check (quiz), with answer key. Skill: Interpret the slope and intercept of a linear model in context. Level: Grade 9 — also suits Year 10 (UK).
For teachers: skills & standards
- CCSS S-ID.C.7: Interpret the slope and intercept of a linear model in context
- Works as a morning-work page, a centre/station activity, homework or an early-finisher task.
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It is designed for Grade 9 (ages 14–15), but use it with any child who is ready.
What skills does it build?
Interpret the slope and intercept of a linear model in context.
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More “Interpreting Slope & Intercept” printables (s-id.c.7: interpret the slope and intercept of a linear model in context)
Interpreting Slope & Intercept: Practice A (S-ID.C.7) · Interpreting Slope & Intercept: Practice B (S-ID.C.7) · Interpreting Slope & Intercept: Mixed Practice & Reasoning (S-ID.C.7) · Interpreting Slope & Intercept: Show Your Thinking (S-ID.C.7)
All 5 interpreting slope & intercept sheets → · Grade 9 Math (Algebra I): all 10 skills → · All Common Core grades
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