DA3 Review

Front

What is the rate of change represented by a graph showing a distance of 80 miles covered in 2 hours?

Back

40 miles per hour.

Front

Presley charges a flat fee of $3 plus a rate per hour for babysitting. If she babysat for 6 hours and charged $33, what is the equation for the cost, C, after h hours?

Back

C = $5h + $3.

Front

What is the equation of the line represented by the graph that has a slope of 2 and a y-intercept of -2?

Back

Front

If Joe earned $400 and the graph shows a linear relationship between hours worked and earnings, how many hours did he work if the rate is $16 per hour?

Back

25 hours.

Front

In a graph showing the weight of two puppies over time, if both weigh 3 pounds at 4 months, what can be inferred about their growth?

Back

Both Puppy 1 and Puppy 2 weigh 3 pounds at the age of 4 months.

Front

What does a linear relationship in a graph indicate about the relationship between two variables?

Back

It indicates that as one variable changes, the other variable changes at a constant rate.

Front

How do you calculate the total cost C for babysitting if the hourly rate is $5 and there is a flat fee of $3?

Back

C = $5h + $3, where h is the number of hours.

Front

What is the significance of the slope in a linear equation?

Back

The slope represents the rate of change between the two variables.

Front

If a graph shows a line with a negative slope, what does this indicate about the relationship between the two variables?

Back

It indicates that as one variable increases, the other variable decreases.

Front

What is the formula for calculating the slope (m) of a line given two points (x1, y1) and (x2, y2)?

Back

m = (y2 - y1) / (x2 - x1).