When the cost of a car wash was $8, there were 90 customers. When the cost was reduced to $4, there were 170 customers. Assume the relationship is linear.

A line models the relationship between the cost, x, and the number of customers, y. What is the slope of the line?

Question

When the cost of a car wash was $8, there were 90 customers. When the cost was reduced to $4, there were 170 customers. Assume the relationship is linear.

A line models the relationship between the cost, x, and the number of customers, y. What is the slope of the line?

studygurl14 · Answer

Do you know the slope formula?

studygurl14 · Answer

Where points
$$(x_1,y_1)$$ and $$(x_2,y_2)$$ are on the same line,
$$slope=\frac{y_2-y_1}{x_2-x_1}$$

studygurl14 · Answer

"When the cost of a car wash was $8, there were 90 customers."
(8,90)
"When the cost was reduced to $4, there were 170 customers."
(4,170)

studygurl14 · Answer

Can you do the rest yourself?

anonymous · Answer

yh thx so much

studygurl14 · Answer

You're welcome. :) Can I please have a medal?