8th Math Semester Review Part 4 24-25

Front

What is the correlation between the length of a running start and the distance of a jump?

Back

Positive correlation: the further you run, the further you jump.

Front

Which graph is NOT a function?

Back

Graph 1 is NOT a function.

Front

If the mass of a substance varies directly with its volume, and 100 kg of the substance is 80 liters, what is the volume of 3.2 kg of this substance?

Back

2.56 cubic liters.

Front

Write the equation to determine how many blinds need to be installed for the price to be equal between two companies: Company A charges $25.00 for one room and $5.00 for each additional window; Company B charges $30.00 for one room and $4.00 for each additional window.

Back

25 + 5x = 30 + 4x.

Front

What is the solution to the equation modeled in the picture?

Back

7.

Front

Define a function in mathematics.

Back

A function is a relation that assigns exactly one output for each input.

Front

What is the formula for calculating the area of a rectangle?

Back

Area = length × width.

Front

What does it mean for two variables to have a direct variation?

Back

If one variable increases, the other variable also increases at a constant rate.

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).