10. CAMPING The entrance fee to the national park is $15. A campsite fee is $15 per night. The total cost y for a camping trip for a nights can be represented by the equation y = 15x + 15. a. Graph the equation. b. Use the graph to find the total cost for 4 nights. c. Interpret the slope and the y-intercept.​

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

the 3rd on is correct

step-by-step explanation:

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4