Number of pages 50 100 150 200
Cost 1.25 1.85 2.45 3.05

Which equation gives the cost, y, in terms of the number of pages, x?

A. y= 0.012x + 49.985

B. y = 0.012x + 0.65

C. y = 83.3x + 0.65

D. y = 0.012x + 1.25

Question

Number of pages	50	100	150	200
Cost	1.25	1.85	2.45	3.05


Which equation gives the cost, y, in terms of the number of pages, x?
		

            A. y= 0.012x + 49.985
		

     B. y = 0.012x + 0.65
		

      C. y = 83.3x + 0.65

            D. y = 0.012x + 1.25

anonymous · Answer

okay then about this one

danjs · Answer

notice the increase in x is the same from point to point,   and the increase in y is constant, 0.06 more than the last...

it is a linear equation

y=m*x+b

danjs · Answer

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danjs · Answer

calculate the slope, and the y-intercept b (initial cost of 0 pages)

danjs · Answer

the cost is determined by the #pages,   so it is independent ly chosen variable, and is usually horizontal in the x direction

anonymous · Answer

thank you can you help me with this one though

anonymous · Answer

Which is the equation of the given line in slope-intercept form?

	a.y= -1/4x+1
	b. y= -4x-1
         c. y= 4x-1

          d. y= 4x+1

danjs · Answer

slope-intercept form

y = m*x+b

danjs · Answer

use any 2 points on the line to figure the slope m,   that one looks lik eyou can read the y-intercept right from the grpah, crosses a gridline on y-axis

danjs · Answer

what about line equations is the confusing part?

anonymous · Answer

All of it cause i forgot all about this stuff