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y = 4x - 5
Is a line that has a slope of 4 and has a y-intercept of -5.
When we say slope, it means the tangent of the angle the line make with the x axis. In our case the tangent is 4. The angle whose tangent is 4 is about 76 degrees. So the line makes an angle of 76 degrees to the x-axis and intersects the y-axis at point with coordinates 0, -5
It depends on what the domain and the range are. If the range is the positive integers, then the mapping is not even defined.
u decide
a = 3 and y = 0
y=9x=3it equals ......y= 3.334
The y-intercept equals 0.