The equation y = 38x + 50 models the data on a plumber's scatter plot, where x is the number of hours the plumber works, and y is the total bill in dollars. If Sal pays the plumber $126, how many hours did the plumber work? 1 hour
1.75 hours
2 hours
2.5 hours

2 hours

Step-by-step explanation:

I substituted y for 126 and solved like so:

126 = 38x + 50

126 - 38x = 50

(126-126) - 38x = 50 - 126

-38x = -76

-38x/-38 = -76/-38

X = 2

There ya go! Hope this helps, good luck :)

the correct answer is option c.   3

step-by-step explanation:

points to remember

equation of the line with coordinates (x₁, y₁) and (x₂, y₂) is given by,

slope m = (y₂ - y₁)/(x₂ - x₁)

from the figure we can see a line with two coordinates given

to find the slope of given line

here   (x₁, y₁)   = (-1, -1 ) and (x₂, y₂) = (1, 5)

slope m = (y₂ - y₁)/(x₂ - x₁)

  = (5 - -1)/(1 - -1)

  = (5 + 1)/(1 + 1)

  = 6/2 = 3

therefore the correct answer is option c.   3