Practice Quiz 2 of 4

A race car travels y = 210x miles in x hours. In the table, x goes 0, 1, 2, 3, 4, 5. By how much does y change each time x goes up by 1?

In the proof, linear functions are written as f(x) = mx + b. What is the name of this form?

Solve 5x + y = 10 for y. What is y when x = 3?

Is the number of basketballs manufactured per day discrete or continuous?

The graph shows a hotel’s total cost by number of rooms. Which statement is true?

Peter pays $3 for each book: f(x) = 3x. What is the range?

Find the y-intercept of 3x − 2y = 6.

Find the y-intercept of −6x − 8y = 24.

Which point is both an x-intercept and a y-intercept?

A hot air balloon’s height is f(x) = 750 − 25x. What does the y-intercept (750) mean?

Connor runs a 10 km race at 1 km every 4 minutes: f(x) = 10 − 1⁄4x km left. How many minutes until he finishes?

For any line Ax + By = C, what is the x-intercept?

Postage table — Years after 2000 (x): 3, 4, 6, 8, 13  |  Cost in cents (y): 37, 37, 39, 42, 46.
What is the rate of change from 2004 to 2006?

Find the slope of the line.

Use the slope formula to find the slope through (−6, 5) and (−4, −3).

A table shows x: 1, 2, 3, 4 and y: 5, 5, 5, 5. What is the slope of the line?

Water flows into a reservoir. After 40 hours there are 3000 ft³, and after 60 hours there are 4000 ft³. What is the slope?

Printing costs: 1000 pages cost $310 and 3500 pages cost $460. What is the slope (dollars per page)?

Postage table — Years after 2000 (x): 3, 4, 6, 8, 13  |  Cost in cents (y): 37, 37, 39, 42, 46.
Between which years is the rate of change the greatest?

A section of the Mount Washington Cog Railway has slope 0.37. A vertical change of 1 unit goes with a horizontal change of how many units? (Round to the nearest hundredth.)