You set the equation equal to zero and solve for x.
eg. y=2x-4
0=2x-4
4=2x
x=2
so the line intercepts the x axis at 2, ie point (2,0).
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To find the x-intercept for 5x - 4y = 18, plug in a 0 for the y value and solve for x. 5x - 4(0) = 18 5x = 18 x = 18/5 or 3.6 The line will hit the x-axis at (3.6,0)
You find the median to find the middle number
You find the length and height of the shape, them you find the volume
you find the length and width by counting the numbers on the side to find the width and counting the numbers going across to find the length
Find the distance of each side and add to find the total perimeter.