Question

The graph represents the cost y (in dollars) to open an online gaming account and buy x games. Write an equation in slope-intercept form that represents the graph

Answer 1

Answer:

y=10x+15

Step-by-step explanation:

The slope intercept form is represent by this equation

$y = mx + b$

Where m is the slope, and b is the y intercept( when x is zero).

Looking at the graph, we already found the y intercept.

When x=0, y is at 15 so our y intercept is 15 so our equation updated look like

$y = mx + 15$

Now let find the slope

Slope is

$\frac{change \: of \: y}{change \: of \: x}$

Let use two arbitrary points to find the slope

Let use (3,45) and 6,75).

$\frac{75 - 45}{6 - 3} = \frac{30}{3} = 10$

So our slope is 10 so our equation look like

$y = 10x + 15$