Midterm Review

Front

What is the equation to model the total cost (y) at an amusement park based on the number of rides (x)?

Back

y = 1.5x + 20

Front

If you spend $23 at the amusement park, how many rides did you ride if the cost per ride is $1.5 and there is a $20 entrance fee?

Back

2 rides

Front

What is the equation of the trend line if it is represented as y = mx + b?

Back

y = 20x + 100

Front

How can you represent the amount Bob has in his savings account after x months if he starts with $150 and saves $40 each month?

Back

y = 40x + 150

Front

What does the equation 25 + 0.05x = 50 + 0.01x represent in a real-world scenario?

Back

It represents two cell phone companies charging based on minutes used, where one charges $50 plus 5 cents per minute and the other charges $25 plus 1 cent per minute.

Front

Which set of ordered pairs is a function?

Back

{(6,-5), (7, -3), (8, -1), (9, 1)}

Front

What is a function in mathematics?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

What is the slope-intercept form of a linear equation?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis (x=0).