Slope-Intercept Form of a Line Answers

Grace is comparing cell phone plans. A prepaid phone plan costs $0.20 per minute and has no monthly fee. A contracted phone plan costs $50 per month and $0.02 per minute. How will the graphs of the monthly costs of the two cell phone plans compare where x represents minutes purchased in a month?

A leaf hangs from a branch 12 feet in the air. It falls to the ground at a rate of 0.25 feet per second. Which graph could represent the leaf’s height in feet as a function of time, in seconds, after leaving the branch?

What is the slope of the line represented by the equation y = –x + ?

What is the slope of the line represented by the equation y = x – 3?

What is the slope of the line represented by the equation y = – – 5x?

A coordinate plane with a line drawn passing through the points (0, 3) and (3, 2).

Which statements are true about the lines? Select three options.

The graph represents revenue in dollars as a function of greeting cards sold.

A coordinate plane with a line drawn passing through the points (0, 3) and (1,1).

What is the y-intercept of the function f(x) = –x + ?