All are relations except for relation 3
The first one is categorical data
the second one is discrete numerical
and the third one is continuous numerical
i hope this helps you
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2 figures are congruent if at least 2 sides are the same length, there angles are the same, etc
No; you can not have an x-value go to more than one y-value
To find the equation take the slope 2/3
y-y(1)=m(x-x(1)
y-4=2/3(x-8) = 2/3x-16/3
Next solve for y
y=2/3x-16/3 +4(turn 4 into a fraction with a common denominator)
y=2/3x-16/3 + 12/3
y=2/3x-4/3
