(17, -13), (17, 8)
What is the slope through the line

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Step-by-step explanation:

We can use the slope formula

m = ( y2-y1)/(x2-x1)

    = ( 8 - -13)/ ( 17-17)

   = ( 8 +13)/ ( 17-17)

   = 21/ 0

We can not divide by 0, so the slope is undefined

Undefined  slope:-  the line is vertical

Step-by-step explanation:

The slope for the line joining the points (x1, y1) and (x2, y2)

= (y2-y1)/(x2-x1)  so here it is:

(8 - (-13))/ (17-17)

= 21/0

As the denominator is zero the line is vertical.

if x decreases by 4 then y increases by 10

step-by-step explanation: