Unit 3 Test Practice - Extra Credit if you earn at least 80%

Front

What is the equation to represent the total amount of money saved after x weeks if Julia saves $20 each week and starts with $300?

Back

y = 20x + 300

Front

How many times does Karen post on social media each day if she posts 21 times a week?

Back

3 times per day

Front

What is the pace of a runner who completes 20 laps in 30 minutes?

Back

1.5 minutes per lap

Front

What is the y-intercept of a line if it crosses the y-axis at (0, 4)?

Back

4

Front

How do you calculate the slope between two points (1,8) and (3,12)?

Back

Slope = (y2 - y1) / (x2 - x1) = (12 - 8) / (3 - 1) = 2

Front

What does the slope of a line represent in a graph?

Back

The rate of change of y with respect to x.

Front

If a line has a slope of 2, what does this indicate about the relationship between x and y?

Back

For every 1 unit increase in x, y increases by 2 units.

Front

What is the formula for finding the y-intercept of a linear equation?

Back

Set x = 0 in the equation.

Front

How can you determine who posts more on social media between two people?

Back

Compare the number of posts per day.

Front

What is the significance of the y-intercept in a real-world context?

Back

It represents the starting value when x is zero.