If the image of the linear function y = kx-4 and the positive proportion function y = KX passes through the point (2, - 1), the area of the triangle formed by the image of the two functions and the x-axis can be calculated | Math enthusiast | Mathematical art

If the image of the linear function y = kx-4 and the positive proportion function y = KX passes through the point (2, - 1), the area of the triangle formed by the image of the two functions and the x-axis can be calculated

Y = kx-4, the image passes through the point P (2, - 1),
-1=2k-4,
K=3/2,
y=3/2x-4,
The images of y = MX all pass through the point P (2, - 1),
-1=m*2,
m=-1/2,
y=-1/2x,
Y = 3 / 2X-4, solve the equation, x = 2, y = - 1
The straight line y = 3 / 2X-4, the intersection point with X axis is (8 / 3,0),
The area of the triangle formed by two straight lines and x-axis is?
1/2*8/3*1=4/3.

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