Question

HELP PLEASE!
The graph below shows the revenue earned by a company in its first four quarters of operation. A line of best fit has been drawn on the graph.

A first−quadrant grid with 'Revenue (in 1000 dollars)' as they y−axis label and 'Number of Quarters' as the x-axis label. The y axis ranges from 0 to 55 with an interval of 5 units. The x axis ranges from 0 to 7 with an interval of 1 unit. There are points at the following locations: (1, 1)(2, 25)(3, 30)(4, 40). A straight line is drawn through the points and passes through (1, 1)(3, 30) and (4, 40).

Answer 1

Based on the linear model, how much revenue, in thousands of dollars, should the company earn in its 8th quarter of operation? Type your answer in the box below.

Answer 2

@jim_thompson5910 can you help?

Answer 3

Is the coordinates (1 , 1) or (1 , 10)

Answer 4

I am assuming it's (1 , 10) or else it's not a straight line anymore

Answer 5

its 1,10

Answer 6

Find the equation of the line, using y = y1 + m(x - x1) where m is the gradient and (x1 , y1) is a coordinates of a point on the line.
Gradient = (30 - 10) / (3 - 1) = 20 / 2 = 10
Using (1 , 10):
y = 10 + 10(x - 1) = 10 + 10x - 10 = 10x
x = 8
y = 10(8) = 80

Answer 7

so its 80,000?