What is the Y intercept of the points (5,9) (6,7)?

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Answer 1 · 2016-07-21T03:19:03

19

I assume that you mean "What is the #Y# intercept of the line joining (5,9) and (6,7)?"

We start by writing down the equation of a straight line
#y= m x+c#
here #m# is the slope and #c# is the #Y# intercept.

Since (5,9) and (6,7) are on this line, we have

#9 = 5m+c#
#7 = 6m+c#

Subtracting,

#2 = -m#

Putting this back in any one of the equations, we get

#9 = 5 xx (-2) +c#

so that #c=19#.