Circles
What is the center of the circle?
(x - 9)2 + (y + 2)2 = 16
(9,-2)
Lines that are parallel have the ___________ slope.
Same
Identify the slope of the equation:
y + 2 = 1/3(x - 5)
1/3
What is the distance formula?
Sqrt((x2-x1)2 + (y2-y1)2)
What is Ms. Marsala's favorite city in the world?
Salt Lake City, Utah
Identify the radius:
(x + 3)2 + y2 = 121
11
Lines that are perpendicular have slopes that are _______________ ________________.
Negative Reciprocals
Identify the point in the equation
y - 7 = -5(x + 1)
(-1,7)
Write the Pythagorean Theorem formula
a2 + b2 = c2
What is Ms. Marsala's favorite team in sports?
Chicago Blackhawks
What is the general formula of a circle with center (x1,y1) and radius r?
(x - x1)2 + (y - y1)2 = r2
Are the equations parallel, perpendicular, or neither?
y = 2x - 1
y + 3 = -1/2(x + 6)
Perpendicular
What is the general formula of a point-slope equation with point (x1,y1) with slope m?
y - y1 = m(x - x1)
Find the distance between (0,0) and (3,4)
5
How many US states has Ms. Marsala visited?
All 50 States
Graph the circle:
x2 + y2 = 9
Check Graph: Must be a circle with a center at (0,0) and radius of 3
Write the equation of the line parallel to y = 3x + 2 through (-1,5)
y = 3x + 8
Write the equation in point-slope form through (3,2) with slope = -4.
y - 2 = -4(x - 3)
Find the distance between (-6,-10) and (-2,-10)
4
In what European country has Ms. Marsala traveled alone to visit family?
Sweden
Write an equation of a circle whose radius is 13.
The right side of the equation must contain the number 169.
Write the equation of the line perpendicular to y = -1/2x through (2,4)
y = 2x
Graph the equation:
y - 1 = 2/3(x + 2)
Check graph: Must have point (-2,1) with slope 2/3
Find the distance between (-2,3) and (-7,-7)
11.18 or 11.2
Who is Ms. Marsala's favorite athlete in sports history?
Brent Seabrook (Retired Chicago Blackhawk)