# Grade 9 Math: Linear Relations and Equations Direct Variation

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### What is direct variation?

A relationship between two variables in which one is a constant multiple of the other.
A relationship between three variables in which one is a constant multiple of the other.
A relationship between two variables in which two is a constant multiple of the other.
none of the above

### What is a partial variation?

The equation is of the form \y-y_1=m(x-x_1)\) where x is not zero
The equation is of the form $$y=mx+b$$ where b is not zero
The equation is of the form $$ax+by=c$$ where c is not zero
none of the above

### Is the following equation a Partial Variation or Direct variation $$y=15x-6$$

Partial
Direct
Does not exist
none of the above

### Is the following equation a Partial Variation or Direct variation $$y=\frac{1}{4}x$$

Direct
Partial
does not exist
none of the above