Question

http://prntscr.com/5cshyg

@iGreen @ganeshie8 @Directrix

Answer 1

Plug in x = 1 into the equation y = 55x + 85.

y = 55(1) + 85

Can you simplify that?

Answer 2

slope tells you the "rate"

Answer 3

Wait..

Answer 4

y = 140? @iGreen

Answer 5

Oh, @ganeshie8 is right..so what's the slope of y = 55x + 85?

Answer 6

m = 55

Answer 7

Right..so that's how much he charges per hour.

Answer 8

Now we find the slope of the table.

Let's take points (1, 115) and (2, 180)

\(m = \dfrac{y_2-y_1}{x_2-x_1}\)

\(m = \dfrac{180-115}{2-1}\)

Can you finish that?

Answer 9

m = 65

Answer 10

Right, so the slope of the table is 65.

Answer 11

So the Plumber charges $55 an hour, and the Electrician charges $65 an hour.