y = 15x + 10
Step-by-step explanation:
Given a graph, we use the equation of line y = mx + b
m = slope
b = y-intercept
First let's find the slope using the formula:
The y-intercept is the value of y when x = 0. It is also the value of y when the line crosses the y-axis.
The value of cost when time is zero
The line crosses the y-axis at y = 10
Hence, the y-intercept is 10
The equation of line becomes:
y = 15x + 10