What Depends?
A car wash charges $10 per car.
What is the independent variable?
Number of cars washed
“$12 per hour”
Write the equation.
d for dollars
h for hours
d = 12h or 12h = d
Table increases by +10 each row.
Add or multiply?
add
What do you find FIRST on any table or graph?
THE PATTERN
Sophia earns $12 per hour babysitting.
Which variable depends?
Money
“Chelsey runs 2.8 miles more than Kyle.”
Which equation is correct?
A) c = k + 2.8
B) c = 2.8k
A) c = k + 2.8
Table doubles every time.
Add or multiply?
multiply
What decides add vs multiply?
Same difference → add
Same ratio → multiply
Which one do we CONTROL?
A) Hours worked
B) Money earned
Hours worked
What word usually means add?
A) per
B) more than
C) times
B
MORE THAN
Graph goes through (0,0).
What type?
multiply
Which variable is usually x on a graph?
independent
Which is NOT the independent variable?
A) Cars washed
B) Hours worked
C) Money earned
D) Tickets sold
Money earned
Which situation is multiplication?
A) $3 more than last year
B) $5 per ticket
B) $5 per ticket
Graph starts at (0,3).
Add or multiply?
add
Equation form: y = x + 3
Which equation is correct?
A) h = 12d
B) d = 12h
“$12 per hour”
d= dollars
h = hours
B
d = 12h
True or False:
“The dependent variable usually goes on the y-axis.”
TRUE
If Kyle runs 4 miles, how far does Chelsey run?
c = k + 2.8
Plug in, don’t overthink.
6.8
Pizza uses 0.5 pounds of cheese per pizza.
Equation?
y = 0.5x
True or False:
“If I check the pattern and say it in words, I’ll get the equation right.”
TRUE