Vocab
Solving Proportions
Slope
Direct Variation
Wild
100
What is the cross products property?
It allows you to solve an equation by seeing if the numbers that are diagonal from each other are equal.
100
Solve x/2 = 4/8
x=1
100
#1 page 194
slope = 2/5
100
y=2x+2
No, this does not show direct variation because it is not in the form y=kx
100
Who won the Super Bowl?
Patriots
200
What is slope?
Slope is the rate of change between any two points on a graph. It is also a measure of the steepness of a line
200
Solve 5/x = 15/10
x=2
200
#2 page 194
Slope = 3
200
y=1/2x
Yes, it is in the form y=kx so x and y are proportional.
200
What is 1/2 + 2/3?
7/6
300
What is the equations for slope? (Hint: there are two)
1) Change in y / Change in x 2) Delta y / Delta x
300
Solve x/3 = 8/6
x=4
300
#10 page 196 make sure you plot the points and graph the answer.
slope = 45 words per minute
300
FREE POINTS
FREE POINTS
300
2 - (-5)
7
400
What is direct variation and what is the equation that we use to see if there is a proportional relationship?
Direct variation tells us that x and y have a proportional relationship and the equation is y=kx
400
Solve a/6 = 15/2
a=45
400
#12 on page 196
slope should be 5/4
400
#6 page 202
yes, the line passes through the origin and it is a straight line.
400
2+3
5
500
What is the constant of proportionality?
The constant of proportionality is k and it can be any number besides 0.
500
Solve 4/k+3 = 8/14
k=4
500
#16a + 16b page 197
16a) Your friends graph is steeper 16b) your slope = 60/4 or 15 dollars per week Your friends slope is 60/3 or 20 dollars per week
500
#26 on page 203
yes, x and y do show direct variation because the graph passes through the origin and it is a straight line
500
What is my favorite color?
BLUE!!!!!!!!
M
e
n
u