Question

How much does one slice of pizza cost?


Is the graph a proportional relationship?


What’s the equation for this graph?

Answer 1

Answer:

• One slice of pizza costs $4.5

• Yes it shows proportional relationship.

• Equation: y = 4.5x

Explanation:

(a)

take best two coordinates: (2,9),(3,13.5)

$\frac{y2-y1}{x2-x1}$

$\frac{13.5-9}{3-2}$

$4.5$

$\hookrightarrow$ One slice of pizza costs $4.5

(b) Yes the graph shows proportional relationship as its a straight linear line

(c) using the formula: y = mx + b ....where m is slope and b is y-intercept.

Here the y-intercept is 0 and we found slope that is 4.5.

Therefore:

y = 4.5x + 0

y = 4.5x