A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks:
07_08_LQ_4.gif
Which equation gives the cost, y, in terms of the number of pages, x?
A.
y = 0.012x + 49.985
B.
y = 83.3x + 0.65
C.
y = 0.012x + 0.65
D.
y = 0.012x + 1.25
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OpenStudy (aripotta):
take two points, find the slope. then take one point and the slope, and put them into point-slope form: y - y1 = m(x - x1). then convert that into slope-intercept form
OpenStudy (brucebaner):
so em i Right or not is it D
OpenStudy (brucebaner):
@iambatman
OpenStudy (aripotta):
it's not d
OpenStudy (aripotta):
can you show your work?
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OpenStudy (brucebaner):
first find found the slope 1.25−1.8550−100=0.012
OpenStudy (brucebaner):
and when i use any point to find the y intercept use point (50,1.25) and we get y = 0.012x+b becomes 1.25=0.012(50)+b so b = .65 and you are CORRECT✓