Answer:
y = [tex]\frac{1}{7}[/tex] x + 30
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (0, 30) and (x₂, y₂ ) = (70, 40) ← 2 points on the line
m = [tex]\frac{40-30}{70-0}[/tex] = [tex]\frac{10}{70}[/tex] = [tex]\frac{1}{7}[/tex]
The line crosses the y- axis at (0, 30) ⇒ c = 30
y = [tex]\frac{1}{7}[/tex] x + 30 ← equation of line
