The value of x when y is 20is calculated to be 20
How to predict the value
The value is predicted using the equation of the line of best fit
The equation graphed is written in the slope intercept form s below
y = mx + c
where
m = slope
x = intercept
The slope, m is calculated using the points on the graph (4, 8) and (0, 5)
m = (y₀ - y₁) / (x₀ - x₁)
m = (8 - 5) / (4 - 0)
m = (3) / (4)
m = 3/4
c = y intercept, from the graph
c = 5
The equation of the line is y = 3/4 x + 5
For y = 20
20 = 3/4 x + 5
20 - 5 = 3/4 x
3/4 x = 15
x = 4 * 15 / 3
x = 20