Can someone explain y-intercept? I had a test, and I am pretty sure I bombed it. I really need help!!

Mathematics

2 answers:

Natalka [10]3 years ago

7 0

About Y-Intercept:

Y - intercept is part of an ordered pair. The y-intercept is the 2nd number in an ordered pair. Like, for example, (3,5)... 3 is the x - intercept & 5 is the y -intercept. Y-intercept is a point on the line & is also known as the starting point. Y - intercepts can be used in 4 different forms: Standard Form, Slope -Intercept Form, Point Slop Form, and this form (<u>Y2 - Y1</u>)

X2 - X1

Hope this info helps!!! :)

Dvinal [7]3 years ago

5 0

Y-intercept, it can be described as y-intercept form, or another way of writing it in mathematical form is y=mx+b, this can be used to draw polygons, find ortho-centers (very difficult), etc. m is the rise/run, rise over run, or 1/2. The rise and the run is the rate of change. b is the starting point or slope where it starts at, that is most of it!

You might be interested in

Can someone help with this question? Thank u! :)

MatroZZZ [7]

Answer:

2.50

Step-by-step explanation:

the pattern shown in the miles driven goes up each time by 5000, stating it's going up by a constant of 5000. the cost goes up each time by 2000.

divide 5000/2000 which would give you 2.5

round it by two decimal places which gives you 2.50

7 0

3 years ago

What is the perimeter of the triangle below? Round to the nearest hundredth.

Keith_Richards [23]

You're going to need to use Pythagoras' theorem to work this one out!

As you know, the perimeter of a triangle is just all the lengths of the sides added up.

We'll start with side AC first. We can see that A is (-8, -4) and C is (-6, -2). That means to get from A to C, we need to go 2 units to the right, and 2 units up. Which means we have our two sides to work out the length from Pythagoras' theorem. 2² + 2² = c², c = √8.

Now we'll move onto side AB. We already know A is (-8, -4) from above, and B is (-7, -8). That means to get from A to B, we have to go 4 units down, and 1 unit to the right. So once again: 4² + 1² = c², c = √17.

Lastly, we'll work out side BC. We know that B is (-7, -8) and C is (-6, -2). That means to get to C from B, we have to go 1 unit to the right and 6 units up. So, again: 1² + 6² = c², c = √37.

Now that we have all of our lengths, we simply just add them up!

√8 + √17 + √37 ≈ 13.03 units.

(I've also attached something to help you visualise how I worked it out.)