6.3 Practice A
Use the graph or table to write a linear function that relates y to x.
1.
2.
2
B
4
5
4
3
2
1
2
o
O
3.
x-1
0 1 2
0-3 -6
x-10-50 5
y -2 -1 0 1
y 3
Cost, y
5. The table shows the cost y (in dollars) of x fluid Ounces of brewed coffee.
a. Which variable is independent?
Fluid Ounces, x 08 1624
dependent?
0 0.51 1.5
b. Write a linear function that relates y to x.
Interpret the slope
C. Graph the linear function
d. How much does it cost to purchase 32 fluid ounces of brewed coffee?

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

step-by-step explanation: