FA Chapter 4 Test Review

Front

What is the y-intercept in the equation y = -4x - 5?

Back

The y-intercept is -5, which is the value of y when x = 0.

Front

If Joe earned $400, how many hours did he work if he earns $16 per hour?

Back

Joe worked 25 hours (400 / 16 = 25).

Front

What percentage of boys had red hair if 10 out of 100 boys had red hair?

Back

10% of the boys had red hair.

Front

What does a slope of -5/7 represent in a real-world context?

Back

It means that for every 7 cups of coffee consumed, there is a loss of 5 hours of sleep.

Front

How do you calculate the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

What is the formula for finding the slope of a line?

Back

Slope (m) = (change in y) / (change in x).

Front

What does it mean if a slope is negative?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

How do you find the y-intercept from a linear equation?

Back

Set x = 0 in the equation and solve for y.

Front

What is the formula for calculating percentage?

Back

Percentage = (Part / Whole) x 100.

Front

If a student plays an instrument, what is the probability they also play on a sports team if the probability is 0.7273?

Back

There is a 72.73% chance that the student plays on a sports team.