A helicopter's altitude changes -28.125 ft in 3.75 seconds. What is the average change in the helicopter's altitude each second (per second)? Explain your thinking AND/OR show your work.
HINT: To find the average change per second divide the total change by the total seconds. This helps you find
an equivalent ratio.

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?