Answer Key — 8.F.A.3

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 2 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 3 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 4 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 5 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 6 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 7 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 8 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 9 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 10 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 12 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 13 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 14 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 15 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 16 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 17 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 18 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 19 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. | | Set 20 | Interpret the equation y = mx + b as defining a linear function, whos… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear. For example, the function A = s2 giving the area of a square as a function of its side length is not linear because its graph contains the points (1,1), (2,4) and (3,9), which are not on a straight line.

Practice test scoring

| Tier | Pass guidance | | --- | --- | | 1–3 | Most oral tasks smooth; majority of written correct | | 4–6 | 7/10+ total with clear understanding | | 7–8 | 9/12+ with explanations | | 9–10 | Near-perfect; ready to move on |

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