NC Math 1 EOC Prep - Linear Regression Models

Front

What is a negative correlation?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What equation represents the relationship between the number of clams (x) and the number of fish Shauna saw?

Back

2x + 6 = 30

Front

How do you calculate coffee sales using the formula y = -60x + 6443?

Back

Substitute x with the temperature (34°) to find y.

Front

What does the slope in a linear regression equation represent?

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.

Front

How do you find the center of a circle given the endpoints of its diameter?

Back

The center is the midpoint of the endpoints. Use the formula: ((x1 + x2)/2, (y1 + y2)/2).

Front

What is the formula for a linear regression model?

Back

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

Front

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

Back

The y-intercept is the value of y when x is 0.

Front

What is the significance of the slope being 61.93 in the equation y = 61.93x - 1.79?

Back

It means that for every hour driven, the distance traveled increases by 61.93 miles.

Front

What is the first step in solving a linear equation?

Back

Isolate the variable on one side of the equation.

Front

What does it mean if there is no correlation between two variables?

Back

It means that changes in one variable do not predict changes in the other variable.