Unit 3 Review Linear Equations (Graded) Block 3

Front

What is the slope of a line that is parallel to a line with a slope of 4/3?

Back

4/3

Front

If a cup of coffee cools 40 degrees every minute, what equation represents the temperature (y) after x minutes if it starts at 210 degrees?

Back

y = -40x + 210

Front

Using the line of best fit, how tall would a tree be 30 years after it was planted if the height is predicted to be 37 feet?

Back

37 feet

Front

What type of association does a graph show if it indicates no correlation between the variables?

Back

none

Front

In the equation y = 40x + 150, what does the y-intercept represent?

Back

150, the starting amount of his savings account.

Front

What is the definition of slope in the context of linear equations?

Back

Slope is the ratio of the rise (change in y) to the run (change in x) between two points on a line.

Front

What does a positive slope indicate about the relationship between two variables?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Front

What does a negative slope indicate about the relationship between two variables?

Back

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

Front

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

Back

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