# 3 Act Math Tasks

## Organized by the Common Core States Standard (CCSS) Initiative

**Not Common Core? Go to Ontario Curriculum alignment**

# Grade 8

## 8.F.4

**Overall Expectation Description:**

## 8.F.4 – Grade 8 – Functions

Use functions to model relationships between quantities.

Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of a relationship or from two (x, y) values, including reading these from a table or from a graph. Interpret the rate of change and initial value of a linear function in terms of the situation it models, and in terms of its graph or a table of values.

## Related 3 Act Math Tasks:

## Flaps!

### How fast is the hummingbird flapping its wings?

**Shared By:**

Jon Orr

**Math Topic:**

Rates, Rate of Change, Slope, Speed, Linear Relations

**Common Core State Standard Alignment:**

## Hot Dog Duel

### How Many Hot Dogs Did They Eat?

**Shared By:**

Robert Kaplinsky

**Math Topic:**

Linear patterning, linear relations and linear equations.

**Common Core State Standard Alignment:**

## Water Balloon Mishap

### How long until it explodes?

**Shared By:**

Jon Orr

**Math Topic:**

Rate, Linear Relations and Direct Variation

**Common Core State Standard Alignment:**

## 25 Billion Apps

### When should you start bombarding the App Store with purchases if you want to win?

**Shared By:**

Dan Meyer

**Math Topic:**

Use functions to model relationships between quantities.

**Common Core State Standard Alignment:**