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Daniel Math Academy · Grade 8 Math

Write Linear Functions from Situations

Skill T.5 · Functions · ★★☆ Medium · Quarter 3

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Write a linear function for each situation.

1. 1
   A tank holds $450$ gallons of water and drains $25$ gallons per minute. Write the water left $y$ after $x$ minutes.
2. 2
   A candle is $27$ cm tall and burns $1$ cm each hour. Write its height $y$ after $x$ hours.
3. 3
   A tank holds $400$ gallons of water and drains $35$ gallons per minute. Write the water left $y$ after $x$ minutes.
4. 4
   A tank holds $200$ gallons of water and drains $25$ gallons per minute. Write the water left $y$ after $x$ minutes.

Daniel Math Academy · Grade 8 Math

Answer Key

T.5 Write Linear Functions from Situations · ★★☆ Medium

1. 1$y=-25x+450$
2. 2$y=-x+27$
3. 3$y=-35x+400$
4. 4$y=-25x+200$