It is a linear function passing through the origin. It represents a direct proportionality between x and y.
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If y equals 5x-15 and x equals 1 then the value of y comes out to be -10. So y equals 5x-15 is -10.
-3
Yes it is a function. 5x + 4y = 0 the same as: 5x = -4y You can also solve for either variable. x = - ( 4 / 5 ) y y = - ( 5 / 4 ) x
[5x+13]
y = 2x + 5x - 12 = 7x - 12 So the zero is 12/7 = 1.7143 (approx)