SOLUTION: Find a if the point (3,a) is on the line that passes through (-2,7) and (5,-3).

Question 771914: Find a if the point (3,a) is on the line that passes through (-2,7) and (5,-3).
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
first find equation of a line that passes through (-2,7) and (5,-3)

Solved by pluggable solver: Find the equation of line going through points

hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-2, 7) and (x2, y2) = (5, -3).
Slope a is .
Intercept is found from equation , or . From that,
intercept b is , or .

y=(-1.42857142857143)x + (4.14285714285714)

Your graph:

if the point (3,a), means and , plug it in equation above

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