Answer:
Jack is 4 times as old as Lacy. 3 years from now the sum of their ages will be 71 . How old are they now?
1 answer:
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<h3>Given ↓</h3>
- Two points that a line goes through
- The line's slope
<h3>Calculations ↓</h3>
When we have two points that a line passes through and asked to determine the slope of the line, the slope formula is going to come in handy.
This is the formula :
y2 and y1 are y-coordinates, and x2 and x1 are x coordinates
Plug in the values :
Which simplifies to , or 1
1 (Option D.)
hope helpful ~