Y-intercept

Find the y-intercept of the graph (-3,-3), (4,3), (8,3). The x-intercept is 1/2.

Correct answer:

y =  -0.4286

Step-by-step explanation:

A=(3,3) B=(4,3) C=(8,3)  y=f(x)=k x+q  Ay=k Ax+q By=k Bx+q (3)=k (3)+q 3=k 4+q  3kq=3 4k+q=3  Pivot:Row1Row2 4k+q=3 3kq=3  Row243 Row1Row2 4k+q=3 1.75q=0.75  q=1.750.75=0.42857143 k=43q=43+0.42857143=0.85714286  k=760.857143 q=730.428571  f(x)=x+0=x  fx:  0=k x1+q 0=0.85714285714286 x1+(0.42857142857143)  0.857143x1=0.428571  x1=0.857142860.42857143=0.5  x1=21=0.5  fy: y=f(0) y=k 0+q=0.8571 0+(0.4286)=0.4286



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