How can you use the point-slope form of a line when only given two points?

If we already have two points of the line, we can find its slope (), its intersection with the y-axis (), hence its point-slope form equation in the following way:

Let's call Point 1:  and Point 2:

The Slope equation is:

Now, the equation of the line in its point-slope form is:

And we can find the intersection with the y-axis () by evaluating the equation with any of the two given points and then isolating .

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.