Question

When asked to write a point slope equation for a line passing through the points (-4,-7) and (3,2) a student wrote y-2=-9/7(x-3). How can he fix this to write the correct equation

Answer 1

First let's find the slope
Slope formula: 
$\frac{y_2-y_1}{x_2-x_1} =slope$
Given the two coordinates: 
(-4,-7) (3,2) 
 x1,y1  x2,y2

Plug these numbers into the formula
$\frac{2-(-7)}{3-(-4)} = \frac{9}{7}$
In this case the mistake that was made was that the student wrote the slope negative instead of positive
Final answer: 
y-2=9/7(x-3)