📝 Interpreting Slope & Intercept: Practice B (S-ID.C.7)
Paginepagineapp.comInterpret the slope and intercept of a linear model in context. Solve each problem.
1. T = 20x + 38, where T is savings in dollars and x is weeks. What do 20 and 38 mean?
2. h = 9x + 32, where h is plant height in cm and x is weeks. What do 9 and 32 mean?
3. C = 25x + 23, where C is cost in dollars and x is months of a phone plan. What do 25 and 23 mean?
4. h = 9x + 13, where h is plant height in cm and x is weeks. What do 9 and 13 mean?
5. h = 2x + 39, where h is plant height in cm and x is weeks. What do 2 and 39 mean?
6. T = 10x + 10, where T is savings in dollars and x is weeks. What do 10 and 10 mean?
7. C = 5x + 46, where C is cost in dollars and x is months of a phone plan. What do 5 and 46 mean?
8. h = 21x + 67, where h is plant height in cm and x is weeks. What do 21 and 67 mean?
9. h = 15x + 35, where h is plant height in cm and x is weeks. What do 15 and 35 mean?
10. T = 12x + 79, where T is savings in dollars and x is weeks. What do 12 and 79 mean?
11. h = 25x + 8, where h is plant height in cm and x is weeks. What do 25 and 8 mean?
12. T = 15x + 24, where T is savings in dollars and x is weeks. What do 15 and 24 mean?
Answer key: 1) 20 = increase per one of x (weeks); 38 = starting value when x = 0 · 2) 9 = increase per one of x (weeks); 32 = starting value when x = 0 · 3) 25 = increase per one of x (months of a phone plan); 23 = starting value when x = 0 · 4) 9 = increase per one of x (weeks); 13 = starting value when x = 0 · 5) 2 = increase per one of x (weeks); 39 = starting value when x = 0 · 6) 10 = increase per one of x (weeks); 10 = starting value when x = 0 · 7) 5 = increase per one of x (months of a phone plan); 46 = starting value when x = 0 · 8) 21 = increase per one of x (weeks); 67 = starting value when x = 0 · 9) 15 = increase per one of x (weeks); 35 = starting value when x = 0 · 10) 12 = increase per one of x (weeks); 79 = starting value when x = 0 · 11) 25 = increase per one of x (weeks); 8 = starting value when x = 0 · 12) 15 = increase per one of x (weeks); 24 = starting value when x = 0
Love free resources? The free Pagine app tracks the books your child reads — kids earn streaks & badges. 📚
App Store ·
Google Play
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 second set of twelve practice problems, 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.
Frequently asked questions
Is this worksheet free?
Yes — it is free to print for home or the classroom. Sign in with a free Pagine account, then use the Print button or save it as a PDF.
What age is it for?
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.
Where can I find grade 9 books to read with it?
Pagine's free library has 20,000+ children's books you can read in the Pagine e-reader or the free Pagine app — sorted by age and grade, with free audiobooks too.
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: Mixed Practice & Reasoning (S-ID.C.7) · Interpreting Slope & Intercept: Show Your Thinking (S-ID.C.7) · Interpreting Slope & Intercept: Quick Check (S-ID.C.7)
All 5 interpreting slope & intercept sheets → · Grade 9 Math (Algebra I): all 10 skills → · All Common Core grades
📚 Read along: 20,000+ free books in the Pagine e-reader
Pair this grade 9 worksheet with a story. Pagine's free library has 20,000+ children's books — classic novels, drama, poetry and non-fiction, classics and free audiobooks — that you can read right in the Pagine e-reader on any phone, tablet or computer, with adjustable text size and night mode. No ads.
Browse free grade 9 books → · Grade 9 reading level · Free audiobooks · High school reading list
📱 Get the free Pagine app — log every book your child reads (scan the barcode or search), set reading goals, and watch streaks and badges grow. Download on the App Store · Get it on Google Play