Unit 4 review

Front

What is the equation of a line where each value of y is 3 more than 1/2 the value of x?

Back

y = 1/2x + 3

Front

What does the average cost of electricity represent in a graph?

Back

It represents a linear relationship where the cost increases with the amount of electricity used.

Front

What is the constant of proportionality in the relationship between cost and weight of grapes if 3 pounds cost $6.57?

Back

The constant of proportionality is $2.19 per pound.

Front

How do you find the constant of proportionality from a table of total costs and number of tickets?

Back

Divide the total cost by the number of tickets to find the cost per ticket.

Front

What is the total cost of playing g games of bowling if each game costs $6.50 and shoe rental is $4.00?

Back

Total cost = $6.50g + $4.00.

Front

What is a proportional relationship?

Back

A relationship where two quantities increase or decrease at the same rate.

Front

How do you graph a linear equation?

Back

Plot points that satisfy the equation and connect them with a straight line.

Front

What does the slope of a line represent in a graph?

Back

The slope represents the rate of change of y with respect to x.

Front

What is the y-intercept in the equation y = mx + b?

Back

The y-intercept is the value of y when x = 0, represented by b.

Front

How can you determine if a relationship is proportional from a graph?

Back

If the graph is a straight line that passes through the origin, it is proportional.