Question

Liam is tracking the growth of crystals for his science fair project. He discovers that the height of a crystal, c, in millimeters, after t days can be modeled by the equation c = 2.4t + 5.

He measures the crystal’s height each day for a week. What is the average number of millimeters the crystal grows each day? Enter only a numerical answer. Do NOT include units.

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1 point
Liam is tracking the growth of crystals for his science fair project. He discovers that the height of a crystal, c, in millimeters, after t days can be modeled by the equation c = 2.4t + 5.

He measures the crystal’s height each day for a week. What is the initial height of the crystal? Enter only a numerical answer. Do NOT include units.

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1 point
Before a heavy rainstorm, there were already 4 inches of water in a flooded ditch. After the storm, the ditch held 22 inches of water. The rain fell at a constant rate, and the storm lasted for 9 hours.

If x represents the number of hours since the storm began and y represents the number of inches of water in the ditch, write a function that models this situation.

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1 point
y = 2x - 4
y = 4x - 2
y = 2x + 4
y = 4x + 2

Answer 1

2.4

5

y = 2x + 4