Math Chapter 2.1

Question 1

2.1 What is the distance formula

Answer 1

D = Square root of (X2-X1) square + (Y2-Y1) square

Question 2

What Formula should you use for this equation if possible solve Find the distance between the points (–3, –4) and ( 3, 0).
Give the exact distance and an approximation to 2
decimal places.

Answer 2

Distance formula correct answer = 2 square root of 13 slide 2.1 page 6

Question 3

What Formula another equation for practice
Find the distance between the points (–1.2, 4.5) and
(3.8, 1.5). Give the exact distance and an approximation
to 2 decimal places.

Answer 3

Distance formula correct answer = square root of 34 or decimal 5.83 page 7 on slides 2.1

Question 4

What Formula do you use for this specific equation Determine if the given points form the vertices of a right triangle
This is on a graph on slide2.1 page 10 A(-2,1) , B(2,5) , C(5,2)

Answer 4

Use the Distance Formula but also the right triangle which is A square + B square = C square the answer should be equal to 50.

Question 5

What is the midpoint formula?

Answer 5

(x1 + x2/2, Y2 + Y1/2)

Question 6

Find the midpoint of the line segment with endpoints
(–1.8 , –3) and (4.5 , –1).

Answer 6

(1.35, -2)

Question 7

Find the x- and y-intercepts.
y-x^2 = 9

Answer 7

x = real no solution bc of negative and square root
y = y-0 = 9 so y = 9 (0,9)

Question 8

Find the x- and y-intercepts
x + |y - 3| + 2

Answer 8

answer for x-int (5,0)
y-int = no solution due to ||