Answer:

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Step-by-step explanation:
The given slope is
and the line goes through the point

This means

We will plug this information into the point-slope formula below and simplify.

We stop here since your teacher wants the answer in point-slope form. As the name implies, point-slope form is very handy to quickly spot the slope and a point on the line.
If your teacher wanted the answer in slope-intercept form, then you'd solve for y to get it into y = mx+b form.